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We need a full stack engineer to upgrade a relatively straight forward deployment using SST.dev. The workflow involves deploying a dockerized python codebase to a lambda function and a RESTful endpoint lambda function that communicates with the python codebase. Logs are stored to dynamo DB and S3.
This stack has been running for a while and now SST needs to be upgraded as well as some related upgrades.
If desired, this contract could lead to long-term maintenance and other related work.
Full Stack Developer - Long-Term Freelance Opportunity
Applied
not specified
4 minutes ago
Client Rank
- Excellent
Payment method verified
$43 313 total spent
36 hires, 15 active
97 jobs posted
37% hire rate,
4 open job
11.96 /hr avg hourly rate paid
2 745 hours paid
3.82
of 26 reviews
Company size: 10
Registered: Mar 30, 2019
Canada
Quebec
18:52
5
We are looking for an experienced Full Stack Developer to join our pool of trusted freelancers for ongoing development, maintenance, and new feature implementation. This is a long-term freelance opportunity where projects will be assigned as business needs arise.
Core Responsibilities:
1. Design, develop, and maintain both front-end and back-end components of web applications.
2. Develop responsive and cross-browser compatible web applications using HTML, CSS, and JavaScript frameworks.
3. Develop and maintain server-side logic using programming languages such as PHP, Python, Java, or Ruby.
4. Integrate front-end and back-end components, ensuring seamless communication and functionality.
5. Manage databases, design efficient database schemas, create seeders, and optimise SQL queries.
6. Develop or integrate CMS functionality with existing backend systems.
7. Integrate third-party APIs and services, including CRM platforms such as Zoho CRM.
8. Write clean, well-structured, and maintainable code.
9. Participate in code reviews and provide constructive feedback.
10. Conduct thorough testing and debugging to ensure application functionality and performance.
11. Optimise applications for maximum speed, scalability, and usability.
12. Implement security measures and optimise application performance, SEO, metadata, and AI indexing.
13. Collaborate with DevOps teams to deploy and manage applications in cloud or on-premises environments.
14. Troubleshoot and resolve issues related to applications, performance, and data integrity.
15. Collaborate with designers to create visually appealing and intuitive user interfaces.
16. Collaborate with other developers, designers, and stakeholders to gather requirements and provide technical expertise throughout the project lifecycle.
17. Stay up to date with emerging technologies, frameworks, and industry trends, and apply them to improve development processes and application performance.
Qualifications:
1. Bachelor’s degree in Computer Science, Software Engineering, or a related field (or equivalent work experience)
2. At least 3+ years of experience as a Full Stack Developer or similar role
3. Strong proficiency in Front-end Languages & Technologies
Javascript and Nextjs 14
Things to take into consideration:
- Experience using the App Router in Next.js
- Experience implementing localisation is a plus
- Ability to integrate and consume APIs within Next.js applications
- Proficient in Git version control.
- Knowledge of frontend performance optimisation.
- Experience developing or structuring dashboard interfaces.
4. Strong proficiency in Back-end Languages & Technologies
PHP, Laravel, MySQL, and Basic Linux
Things to take into consideration:
- Strong understanding of authentication and authorisation.
- Experience developing REST APIs.
- Experience integrating third-party services (e.g. Zoho CRM, Mailchimp, or similar platforms).
- Proficient in Git version control.
- Experience deploying Laravel applications on Linux servers or VPS environments.
5. Solid understanding of database systems (SQL, NoSQL)
6. Experience with cloud platforms (AWS, GCP, Azure) is a plus
7. Self-motivated and results-oriented
How We Work
Projects are assigned individually with a defined scope, timeline, and budget. Some months may have multiple projects, while others may only require maintenance or minor enhancements. Our goal is to establish a long-term working relationship with a dependable developer who understands our systems and can support future development.
We highly value proactive communication, reliability, and accountability. We are looking for a developer who communicates progress regularly, raises any issues or delays early, takes ownership of their work, and can become a trusted long-term development partner.
To Apply, please include:
Your portfolio
Relevant experience
Examples of similar projects
Your availability
We look forward to welcoming a reliable long-term development partner to our team.
§179 Energy Modeling for North Carolina Project
Applied
$500
4 minutes ago
Client Rank
- Good
Payment method verified
Phone number verified
$7 450 total spent
10 hires
12 jobs posted
83% hire rate,
1 open job
4.94
of 3 reviews
Registered: Jan 17, 2026
United States
Katy
09:52
4
I am looking for an experienced energy modeler to build a whole-building simulation that will let my commercial project in Jackonsville (FL) qualify for the §179D tax deduction. The sole objective is to document compliance with ASHRAE Standard 90.1, so every assumption, input and output must be defensible under that guideline.
You will receive architectural and MEP drawings (if available) along with occupancy data and schedules. From there, I need you to:
• Create both baseline and proposed models in EnergyPlus, eQUEST, IES-VE or a similar DOE-approved engine
• Iterate until the model demonstrates the required performance threshold for §179D
• Generate the final compliance report, input files and calculation spreadsheets ready for third-party review by a licensed engineer
Acceptance criteria
• Modeled results align with ASHRAE 90.1 Appendix G methodology
• All simulation files are submitted in an editable format
• Final documentation clearly states the predicted kBtu/ft² reduction and lighting power density, with screenshots or tables that make cross-checking simple
If you have previous commercial §179D experience and can turn this around quickly, I’d like to hear how you would approach the project and your expected timeline.
Fixed budget:
500 USD
4 minutes ago
Engineering & Architecture, Energy & Mechanical Engineering
The Solar Installation Coordinator will be responsible for reviewing the scope of work, putting together contract, confirming equipment with the warehouse for delivery, manage the scheduling and execution of solar panel installations, working closely with installation teams, customers, and vendors to ensure successful project delivery. The ideal candidate will have strong project management skills, a solid understanding of solar systems, and excellent communication abilities.
Key Responsibilities:
Project Coordination:
Schedule installation projects and allocate resources effectively.
Monitor project timelines and deliverables to ensure on-time completion.
Customer Communication:
Serve as the main point of contact for customers throughout the installation process.
Provide updates to customers regarding project status and address any questions or concerns.
Team Management:
Coordinate installation teams, including electricians, technicians, and subcontractors.
Facilitate clear communication among team members to ensure a cohesive workflow.
Logistics Planning:
Order and manage the inventory of solar panels, inverters, and other necessary materials.
Ensure all required permits and approvals are obtained before installation.
Quality Assurance:
Monitoring installation quality and ensuring that all work meets company standards and client expectations.
Troubleshooting:
Address any problems that arise during the installation process quickly and efficiently.
Liaise with technical support to resolve technical issues as needed.
Documentation:
Maintain accurate records of project details, including timelines, budgets, and changes.
Prepare reports on project progress and performance metrics for management review.
Qualifications:
Education:
Bachelor’s degree in a relevant field (e.g., engineering, environmental science, project management) is preferred.
Experience:
Proven experience in project coordination or management, preferably in the renewable energy or solar industry.
Familiarity with solar installation processes and technology.
Skills:
Strong organizational and multitasking skills.
Excellent verbal and written communication skills.
Fluent in English and comfortable talking on the phone occasionally
Proficient in project management software and tools.
Work Schedule
9am - 5pm EST time
Up to 40hrs a week depending on available workload
Hourly rate:
8 - 15 USD
4 minutes ago
Engineering & Architecture, Energy & Mechanical Engineering
Performance Test Engineer | Load, Stress & Scalability Testing for Web Marketplace
Applied
$10 - $25
/ hr
5 minutes ago
Client Rank
- Good
Payment method verified
Phone number verified
$4 069 total spent
6 hires, 4 active
8 jobs posted
75% hire rate,
6 open job
9.68 /hr avg hourly rate paid
415 hours paid
5.00
of 3 reviews
Registered: May 27, 2026
Venezuela
Los Teques
10:52
4
We are looking for an experienced Performance Test Engineer to assess the scalability, stability, and performance of a modern web marketplace application.
The application is built with a cloud-native architecture and integrates multiple third-party services. The goal is to identify performance bottlenecks, validate system behavior under different load conditions, and provide actionable recommendations to improve reliability.
Scope
The assessment should include:
Load testing
Stress testing
Spike testing
Endurance (Soak) testing
Scalability evaluation
Concurrent user simulation
API performance testing
Authentication performance (Google OAuth and email/password)
Database performance analysis
Payment workflow performance
File upload/download performance (if applicable)
Technology Stack
Frontend deployed on Vercel
Backend on Supabase
PostgreSQL
Google Authentication
CRM integration
PayPal integration
CardNet payment gateway
Deliverables
Performance test plan
Load model and workload assumptions
Test scripts
Execution report
Response time analysis
Throughput analysis
Error rate analysis
Resource utilization observations
Bottleneck identification
Performance recommendations
Executive summary
Required Experience
Performance testing of SaaS or marketplace applications
JMeter, k6, Gatling or Locust
API performance testing
PostgreSQL performance analysis
Cloud-hosted applications
Nice to Have
Supabase experience
Vercel deployments
Payment gateway performance testing
Google OAuth performance testing
Expected Outcome
Deliver a comprehensive assessment of the application's performance under realistic and peak workloads, including identified bottlenecks and recommendations to improve scalability before production release.
The Sandbox is expanding its engineering organization to build a new gaming platform from the ground up.
We're assembling a brand-new team of talented engineers who will play a key role in designing, building, and scaling the platform from its early stages. This is an opportunity to make a significant technical impact, influence architecture, and help shape the future of the product.
If you're passionate about building high-quality software and enjoy solving challenging engineering problems, we'd love to hear from you.
We are seeking a knowledgeable and customer-focused Technical Advisor with hands-on experience in solar PV systems, battery energy storage, and hybrid/grid-tied configurations. In this role, you will work directly with customers and internal teams to provide expert guidance on equipment selection, system design, and technical documentation, ensuring the delivery of high-quality, compliant, and efficient energy solutions.
Key Responsibilities:
Provide technical support to customers and sales teams regarding product selection, system sizing, and compatibility of solar, battery, hybrid, and grid-tied solutions.
Review and validate electrical drawings, wiring diagrams, and system layouts to ensure technical soundness, code compliance, and optimal performance.
Serve as a subject matter expert (SME) for residential, commercial, and off-grid solar + storage systems, including lithium-ion batteries, inverters, charge controllers, and monitoring systems.
Collaborate with project engineers, system designers, and installers to troubleshoot design challenges and recommend solutions.
Stay up to date with evolving technologies, safety codes (e.g., NEC, UL, IEC), and utility interconnection requirements.
Support the development of internal resources such as design templates, equipment guides, and technical checklists.
Assist with technical training sessions for staff, partners, or customers as needed.
Qualifications:
Deep understanding of system integration including hybrid inverters, battery storage systems, charge controllers, and AC/DC coupling strategies.
Proficient in reading and reviewing electrical schematics, single-line diagrams (SLDs), and layout drawings.
Familiarity with key industry tools such as PVsyst, AutoCAD, Helioscope, and manufacturer-specific design platforms.
Strong communication skills and a service-oriented mindset.
Experience with both on-grid and off-grid applications, including microgrids or remote power systems.
Hourly rate:
8 - 12 USD
13 minutes ago
Engineering & Architecture, Energy & Mechanical Engineering
Four production codebases, five people. One full-stack dev, one front-end dev, one QA engineer, one DevOps engineer, and me. The gap is a backend specialist who owns schema and API work end to end. The architecture is decided and documented.
I run a product studio in Los Angeles. My background is senior technical program management and analytics for Amazon, Google, Stripe, PayPal, and Nordstrom. Our clients hold us to that standard, and I hold the team to it. The team is small, the bar is not.
You would not work all four codebases at once. Most weeks are one, sometimes two.
HOW WE WORK, AND THE ONLY THING I CARE ABOUT MORE THAN YOUR STACK
We use AI coding agents heavily. I use Claude Code every day and I expect you to. But there is a difference between steering an agent and slinging prompts at one, and that difference is what I am hiring for.
If your process is prompt, run it, paste the error back, repeat until it compiles, you are letting the model make the architecture decisions. I can do that myself.
Here is the process we actually run, on every non-trivial task:
1. Research. Deep-read the relevant part of the codebase and write the findings into a research.md. Not a chat summary. A file I can read and correct before anything else happens.
2. Plan. A plan.md with the approach, code snippets, file paths, and trade-offs. No code yet.
3. Annotate. I open the plan in my editor and write inline notes. Corrections, rejected approaches, constraints, domain knowledge the model does not have. You address the notes and update the document. This cycles two to six times.
4. Todo list. A granular task breakdown added to the plan.
5. Implement. Only now. The plan is the source of truth, tasks get marked complete as they go, typecheck runs continuously.
The point is that by the time code gets written, every decision has already been made by a human. Implementation should be boring. The thinking happened in the annotation cycle.
Boris Tane wrote this up better than I can, and his post describes almost exactly how we work: https://boristane.com/blog/how-i-use-claude-code/
If that reads like unnecessary ceremony, we are not a fit. If it reads like a description of your own workflow, keep going.
THE OTHER HALF OF THAT
Do not read the plan-first process as me handing you requirements. It is the opposite. You do the research, you propose the approach, you make the calls. I annotate the places where you are wrong about something only I could know, a business rule or a product decision. The rest is yours.
We are a small studio, not an enterprise. There is no business analyst writing you a spec. There is no requirements document waiting in a folder. Tickets will be under-specified, sometimes because I do not know the answer either, and part of the job is figuring out what the answer should be.
So read the codebase before you ask. Google it before you ask. Look at how the neighboring module solved the same problem before you ask. When you still cannot resolve it, bring me the question along with the two options you are choosing between.
When you have to assume something, assume it, write the assumption into the plan, and flag it. I will correct it if it is wrong, and that costs me thirty seconds. Ten questions the codebase already answers costs me an hour.
Judgment is the job. The line between initiative and recklessness is whether you did the work to narrow it down first.
WHAT YOU WOULD BE WORKING ON
Everything runs on AWS.
A financial management and P&L SaaS for restaurant operators. Express, Drizzle ORM, Postgres on Supabase, Passport auth, Zod validation, Sentry and AppSignal, POS and Google Workspace integrations, scheduled jobs, PDF and CSV ingestion, on EC2. Most of the hours land here.
An offline-first PWA for rental inventory. Express and Drizzle on Neon Postgres, S3 presigned uploads, QR scanning, an IndexedDB operation queue with a sync engine behind it. Local-first, server-authoritative. Sync conflict resolution is the interesting problem.
A Django and DRF backend for a manufacturing client. Versioned budget line items and variance calculations that have to foot across four surfaces. Python, not TypeScript.
A content platform on Supabase with edge functions and an admin layer. Lighter, but real.
WHY YOU WOULD WANT THIS ONE
You get ownership, not tickets. You take a domain end to end, from schema to endpoint to test, and you keep it.
You are the backend specialist, not the person who does backend on Tuesdays. A dedicated front-end dev handles the client side. A QA engineer verifies the work. A full-stack dev covers the seams.
You are not on-call and you do not own the infrastructure. A DevOps engineer runs AWS, deploys, and pipelines. You write the query, they keep the box up.
The standards are already written. Every repo has an architecture doc covering conventions and settled decisions. You will still meet a 3,000-line file, but you will know why it exists and where new code goes instead.
The patterns repeat. Drizzle, Zod, TanStack Query, Vitest, Playwright, applied the same way everywhere, so what you learn on one repo transfers to the next.
Money moves through one of these products. Inventory moves through another. Your work ships to people who notice.
No agency, no account manager, no committee. You ask a question, you get a decision the same day.
THE WORK
REST endpoints in Express and Drizzle, Zod validation at every boundary
Schema design and Drizzle migrations, including backfills against live data
Query optimization and indexing on Postgres, both Supabase and Neon
Integrations: POS, Google, Resend, S3, Anthropic, OpenAI
Offline sync and conflict resolution on the PWA
Django and DRF serializers, with calculation logic that must match the frontend exactly
Tests. Vitest for unit and integration, Playwright for E2E. QA verifies, QA does not write them for you
Production debugging through Sentry and AppSignal
STANDARDS
Every PR is code you have read, understood, and can defend line by line. If you cannot explain why a query is written the way it is, it does not merge.
Immutability over mutation. Small focused files over large ones. Errors handled explicitly. Input validated at every boundary. No any or unknown types. These live in the repo standards, not in my preferences.
Tell me an estimate is wrong. Do not quietly miss it.
YOU ARE A FIT IF
You have worked inside a serious engineering organization, enterprise or well-run scale-up, and it shows in your defaults. Code review is normal to you, not friction. You have shipped under a release process, owned something in production, and written a postmortem for an outage that was yours
You have shipped production Node and TypeScript backends, Express specifically
You read a Postgres query plan and know what to index
You have used Drizzle or a comparable typed ORM, and you know why a committed migration is never edited
You write tests without being asked
You can read a codebase you did not write and work inside its conventions rather than around them
You have overridden an AI agent's proposed approach recently and can tell me why
You have shipped against an incomplete spec, and you can tell me what you assumed and how you checked it
You have worked in two-week sprints, you size your own tickets, and you say so when a sprint is over-committed
Bonus: Python and Django REST Framework, required for the client backend
Bonus: offline-first or sync-engine experience
WHAT I AM NOT LOOKING FOR
Anyone whose entire history is solo builds, small agency sites, and tutorial projects. This work reaches clients who audit it, and it has to survive that
Equally, anyone who only functions with a business analyst and a fully groomed ticket. Enterprise habits, studio autonomy. I need both, and the combination is the actual job
An agency or a reseller. One person, doing the work themselves. I will ask whether you subcontract, and your answer goes in the contract
A front-end developer who also does some backend. Front end is covered
Rewrites. If your first instinct on an unfamiliar codebase is to replace it, we will not get along
HOW THIS WORKS
Three steps, and you are paid from the first one.
1. A $150 fixed-price task, funded in escrow before you start. A real ticket from the real backlog, and it will be under-specified, on purpose and about as much as the real ones are. You write the research.md and plan.md first, with your assumptions stated, and I approve the plan before you write a line of code. That is how every task here starts, so the trial is the job rather than a simulation of it. You get paid whether or not we continue.
2. A 30-minute call.
3. A paid two-week trial at full rate. If it works, ongoing at 15 to 25 hrs/week.
Rate: $55 to 80/hr depending on experience, the same at every stage. Steady ongoing hours, no sales cycle, no agency margin, and one client who answers the same day.
CADENCE
We run Scrum properly, not as a word in a job post.
Two-week sprints. A 15-minute standup every day. One hour a week for sprint planning and backlog grooming. That is a little over two hours of meetings a week, and at 15 to 25 hours that is roughly a tenth of your time, so price it in rather than discovering it in week two.
Everything outside those is async. Work is tracked in ClickUp.
Standup is live at 2pm CEST, and you need to be on it. That is 1pm in London, 3pm in Bucharest, 5:30pm in Bangalore, 9am in Sao Paulo, and 8am on the US East Coast. If you are on the US West Coast it is 5am, which I am not going to ask anyone to do.
I am in France right now and back in Los Angeles later in the year, so that hour will shift once. If your timezone works for one of those and not the other, say so in your proposal and we will sort it out before you start rather than after.
Send two things through Upwork. Both are required, and proposals missing either one do not get read.
1. A 90-second Loom. Show me a plan or spec you wrote before letting an agent implement something, and the moment you overrode the model. What did it propose, what did you do instead, and why were you right. Phone camera is fine, no slides, no music. I am listening for how you think, not how you present.
2. Two paragraphs on this. A mobile client goes offline for six hours, queues fourteen inventory mutations, then reconnects to find two of those records were edited server-side in the meantime. How do you resolve it, and what do you tell the user.
I have deliberately not told you the business rules, and I am not going to. Decide what they should be, state your assumptions, and answer. Proposals that ask me to clarify the requirements first are answering the wrong question.
Start your proposal with the word MIGRATION, and name the largest engineering organization you have worked in and what you owned there. One line is enough.
Apply through Upwork only. Look up my email, phone, or LinkedIn and contact me there, and you are declined and reported. It violates Upwork's Terms of Service, and I read it as a judgment test, not initiative.
I read every complete proposal and reply inside three business days. If the process I described sounds like how you already work, this will be a short conversation.
Scoped Penetration Test — Small Business Web App with Payment & Payout Flows
Applied
$2,500
24 minutes ago
Client Rank
- Risky
Payment method not verified
1 jobs posted
1 open job
no reviews
Registered: Jan 18, 2023
United States
10:52
1
Project Description
We're a small professional services business (immigration document prep, certified translation, notary, and tax) running a custom web application built on React/TypeScript with a Supabase backend, hosted via Cloudflare. We're looking for a focused, manual penetration test ahead of enabling real financial payouts through our platform.
We are NOT looking for an automated vulnerability scan. We need manual testing by a certified tester who can identify business logic flaws, authorization bypasses, and chained exploits — not just a list of known CVEs.
Three distinct user roles: customer, reviewer (contractor), and admin
Row-Level Security (RLS) policies on our database—please specifically test for privilege escalation, horizontal access (one user accessing another's data), and any role-based bypass
Session management and token handling
2. Payment & Payout Flows (highest priority)
Customer-facing Stripe Checkout across 6 different service types
Stripe webhook signature verification (dispute/refund handling)
A newly built reviewer payout system using Stripe Connect Express — including a 14-day hold period, weekly batch payout logic, and dispute clawback handling
We are specifically concerned about payment amount manipulation, webhook replay/spoofing, and any way a user could trigger, duplicate, or manipulate a payout
3. Sensitive Document & PII Handling
Customers and reviewers upload sensitive documents (immigration paperwork, W-9 tax forms, identity documents) to Supabase Storage
Please test storage bucket access controls specifically—confirm one user cannot access another's uploaded files
4. Reviewer Application/Vetting System
A public-facing application flow with a timed quiz and credential upload—please test for any way to bypass quiz timing, view answers before submission, or escalate an unqualified/disqualified applicant into an approved reviewer
What's explicitly OUT of scope
Physical security / social engineering
DDoS / availability testing
Third-party services themselves (Stripe, Supabase, Resend)—only our integration with them
Requirements
OSCP certification required (or equivalent: OSWE, OSEP, CREST CPSA)—please include your certification in your proposal
Manual, business-logic-focused testing — not primarily automated scanning
Experience with Supabase/PostgreSQL RLS policies specifically is a strong plus, given that's our core access-control mechanism
Please share a redacted sample report from a past engagement so we can evaluate report quality and depth
Deliverables
A written report with executive summary, findings ranked by severity/business impact, and clear reproduction steps
Concrete remediation guidance for each finding
One round of retesting included, to confirm fixes after we address findings
Budget & Timeline
Budget: $2,500–$5,000 for this scoped engagement (open to adjusting based on your proposed hours/day rate—please share your estimate)
Timeline: looking to start within 2-3 weeks, complete within 3-4 weeks of kickoff
We'll provide test/sandbox credentials and a Stripe test-mode environment for testing—no testing will occur against real customer data or live payment infrastructure
How to apply
Please include your relevant certifications; 1-2 examples of business-logic vulnerabilities you've found in past engagements (generalized, no client details needed); your estimated hours/timeline for this scope; and your day rate or fixed-price quote.
Fixed budget:
2,500 USD
24 minutes ago
IT & Networking, Information Security & Compliance
Senior Full-Stack AI Developer for Marketing Intelligence SaaS
Applied
$25 - $67
/ hr
27 minutes ago
Client Rank
- Medium
Payment method verified
Phone number verified
2 jobs posted
3 open job
no reviews
Registered: Jul 16, 2026
Nigeria
15:52
3
Seoptimizes LLC is hiring a senior full-stack developer to help build an AI-powered marketing intelligence SaaS platform.
The product will scan business websites, identify SEO and marketing issues, generate prioritized recommendations, develop marketing strategies, and guide users through executing campaigns and content plans.
We need a product-minded engineer who can build reliable production software—not only connect a basic interface to an LLM API.
Core Features
The development scope may include:
User authentication and onboarding
Multi-tenant business workspaces
Website crawling and data collection
Technical SEO and content audits
AI-generated issue explanations
Prioritized marketing recommendations
Marketing strategy generation
Competitor research
AI content and email generation
Campaign planning
Marketing calendar
Reports and analytics
Third-party integrations
Stripe subscriptions and usage limits
Administrative dashboard
Notifications and background processing
Implement end-to-end data engineering solutions for business analytics on Microsoft Fabric
Applied
$30 - $50
/ hr
29 minutes ago
Client Rank
- Risky
Payment method not verified
Phone number verified
1 open job
no reviews
Registered: Mar 15, 2021
Canada
11:52
1
The Company:
Dimensional Strategies Inc. (DSI), is a premier Microsoft partner located in the GTA, Ontario, Canada. Our customer base extends across Canada and the contiguous US states. DSI’s primary goal is to help our customers execute their business processes more efficiently and effectively via investments in applications and analytics. Core practices include – Cloud Infrastructure, Application Development, Data Engineering & Analytics, and Managed Services.
The Position:
Participate in the end-to-end execution and delivery of our data platform projects that focus on ingesting and curating data for analytical consumption. You will be using DSI's flagship in-house metadata-driven framework for Microsoft Fabric that is based on Medallion Lakehouse architecture.
You will work with the DSI data engineering team and use data engineering specifications to create production-ready data pipelines across Bronze (ingestion), Silver (cleansing), and Gold (curation) layers.
This is a hands-on delivery role - not architecture, not requirements gathering, not custom data engineering or data science.
What You'll Do
· Bootstrap and provision new customer environments in Microsoft Fabric
· Author and maintain YAML-based pipeline configurations for all data layers
· Deploy configurations and artifacts to Microsoft Fabric via CI/CD pipelines
· Configure data ingestion from various data sources including REST API, file sources, and SQL databases
· Define merge strategies, column transformations, and data quality rules
· Validate pipeline outputs by running notebooks and verifying table data in Fabric
· Debug pipeline failures using logs, tracing config errors to resolution
· Manage multiple environments (dev, test, production) across customer projects
· Collaborate with the DSI data engineers that define the specs for the solutions
What You Won't Do
· Gather requirements or collaborate with customers
· Write or modify the data engineering specification
· Perform custom data engineering or research in Microsoft Fabric
· Perform business analysis
· Design solution architecture from scratch
Primary Qualifications
· Multiple years of dedicated data engineering experience
· Strong SQL skills with Spark SQL and T-SQL - window functions, CTEs, aggregations, CASE expressions
· Experience with Lakehouse architecture in Microsoft Fabric including Delta tables, and semi-structured file formats
· Solid understanding of Medallion architecture (Bronze/Silver/Gold) or equivalent layered data patterns
· Experience with REST API integrations - authentication, pagination, JSON response handling
· Familiarity with merge/upsert patterns (SCD Type-1, Type-2, overwrite, append)
· Proficiency with Git - branching, pull requests, merge conflict resolution
· Comfortable reading and authoring YAML configurations
· Understanding of Apache Spark concepts — partitions, lazy evaluation, actions vs transforms
Nice to have Qualifications
· Exposure to CI/CD pipelines (Azure DevOps or GitHub Actions)
· Basic Python reading ability (not writing production code, but can trace logic)
· Familiarity with expression languages like Jinja2
· Experience with Python scripts execution
· Experience with PowerShell scripts execution
· KQL / Kusto query experience for log analysis
· Databricks or Azure Synapse experience
Work Environment
· Fully remote with flexible time management
· Initially supervised by DSI team members, progressing to semi-autonomous and then fully autonomous delivery responsibilities
· Multi-customer project rotation
· Work in a mature well-documented Microsoft/GitHub enterprise environment using established patterns and templates
Hourly rate:
30 - 50 USD
29 minutes ago
Data Science & Analytics, Data Mining & Management
Medical Affairs Services Portfolio account manager (Pharma/Medical Background Required)
Applied
$5 - $8
/ hr
31 minutes ago
Client Rank
- Medium
Payment method verified
Phone number verified
9 jobs posted
22% hire rate,
8 open job
no reviews
Registered: May 12, 2026
United Kingdom
UK
17:52
3
We are an eminent strategic partner to the healthcare, pharmaceutical, and scientific sectors globally. We engineer specialized workforces and deliver elite scientific and commercial consultancy.
We are seeking an expert, highly sophisticated Sales Account Manager with a dedicated background in the pharmaceutical or medical sectors to drive B2B commercial growth for our Medical Affairs Business Unit services portfolio.
In this role, you will be selling our high-value medical affairs solutions, scientific excellence frameworks, and specialized manpower sourcing models directly to pharmaceutical corporations and life sciences enterprises.
You will act as the critical bridge connecting client operational gaps with our specialized business unit capabilities.
Key Responsibilities:
• Manage and scale existing corporate B2B client accounts while actively prospecting new enterprise partnerships within the pharmaceutical and biotech sectors.
• Pitches and positions our Medical Affairs business unit portfolio (including medical affairs consulting, scientific communication strategies, and technical manpower models) to C-suite and Medical Directors.
• Use a consultative selling approach to map client clinical/commercial challenges and structure high-ticket service proposals that solve them.
• Cultivate long-term, high-trust corporate relationships, serving as a knowledgeable partner who understands scientific compliance and industry regulations.
Required Qualifications & Competencies:
• A solid background in the Pharmaceutical, Medical, or Life Sciences industry is strictly required.
• Proven experience in B2B corporate sales, account management, or commercial business development.
• In-depth understanding of Medical Affairs functions, scientific literacy, and global/regional regulatory frameworks.
• Excellent presentation and negotiation skills with a track record of closing complex service contracts.
Client's questions:
1. This position strictly requires a medical or pharmaceutical background. Please describe your experience working within or alongside Medical Affairs/Pharma teams.
2. How do you approach an enterprise pharma client (e.g., a Medical Director or Commercial Head) when pitching a high-value, abstract services portfolio rather than a physical product?
3. Can you share an example of a successful B2B account you managed or a contract you closed within the life sciences sector? What was the deal size and lifecycle?
4. How do you balance scientific/medical accuracy with commercial sales goals when discussing a service portfolio with potential corporate clients?
5. What is your current weekly availability, and do you have experience navigating international or highly competitive healthcare markets?
Hourly rate:
5 - 8 USD
31 minutes ago
Sales & Marketing, Lead Generation & Telemarketing
Structural Engineer - Misc Metals - West Virginia Stamp, Design Report
Applied
not specified
42 minutes ago
Client Rank
- Good
Payment method verified
Phone number verified
$8 009 total spent
3 hires, 2 active
3 jobs posted
100% hire rate,
1 open job
21.06 /hr avg hourly rate paid
328 hours paid
5.00
of 1 reviews
Industry: Manufacturing & Construction
Company size: 2
Registered: Jan 5, 2023
United States
Athens
10:52
4
Seeking structural engineering expertise for several miscellaneous metal elements for a single construction project. I have completed details & model files. Job is for review, design report, and stamp (state of WV) only, as well as acceptable documentation to fulfill GC requirements (WV Workers Comp Policy, Liability Insurance, & Company Safety, Sexual Harassment, Hazard Communication Policies).
Summary of scope items for review:
Div055000 Metal Fabrications
Open access stairway
Supports for overhead coiling shutters
elevator pit ladders
Div055100 Metal Stair System Concrete Pan Fill
(2) Metal pan concrete fill stair systems
We may have additional work for supplemental steel ceiling supports for suspended equipment. To be negotiated separately if the additional work manifests.
Client's questions:
Describe your recent experience with similar projects
Please list any certifications related to this project
Job Title: Talented Game Artist & Graphic Designer for iGaming Projects (Trial to Long-Term)
About the Role:
We are an established software engineering company expanding our portfolio into the iGaming and online casino industry. We are building high-quality, web-based slot/crush games and are looking for a creative, detail-oriented Game Artist / Graphic Designer to join our development pipeline.
We have a busy roadmap ahead and are looking for someone who wants to grow with us as a long-term technical partner.
Current Project Status:
Game 1: Fully built and ready, but requires some immediate, minor graphical adjustments and asset tweaks.
Game 2: Currently in active development. We need a designer to create fresh, high-fidelity graphic designs and game art from scratch.
Future Pipeline: Several more casino games are currently in the planning stage.
What You Will Do:
Phase 1 (Immediate): Jump in and execute minimal design changes and asset updates for our first completed game.
Phase 2 (Ongoing): Create engaging 2D art, UI elements, and overall graphical assets for our second game.
Future Phases: Collaborate closely with our engineering team on the visual design and asset creation for multiple upcoming titles.
Who We Are Looking For:
Proven experience as a Game Artist, UI/UX Game Designer, or Graphic Designer.
A strong portfolio demonstrating web-ready game graphics and high-quality rendering assets.
Bonus: Previous experience designing for the iGaming / online casino industry.
A reliable, communicative professional who thrives in a modern software development environment.
Engagement Details:
We are looking for a lasting partnership. This contract will start as a short-term milestone focused strictly on the Phase 1 adjustments for our first game. If the engagement is successful and we work well together, we will immediately transition this into a long-term, ongoing collaboration for our second game and all future projects.
To Apply:
Please submit your proposal along with a link to your portfolio, specifically highlighting any relevant game art / UI/Graphic design.
Partnerships Lead for Referral Relationships
Applied
not specified
54 minutes ago
Client Rank
- Medium
Payment method verified
Phone number verified
1 jobs posted
1 open job
no reviews
Industry: Tech & IT
Company size: 2
Registered: May 11, 2026
India
Mohali
20:22
3
We're building a US channel to partner with firms that want reliable, cost-effective delivery under their own brand.
Who we want to partner with
We're looking for a US-based partnerships / business-development rep to open doors at firms that subcontract Microsoft and data work:
Microsoft partners & consultancies who need overflow or offshore delivery capacity
Systems integrators & IT consultancies
Data & analytics / BI consultancies needing engineering capacity
You'll own outbound prospecting, initial outreach, qualification, and booking intro calls - then hand warm partners to our team to close.
Why this role matters
US firms get pitched by offshore vendors constantly, so credibility wins the meeting. We're hiring a US-based rep because your location, US phone number, market fluency, and ideally an existing network in the Microsoft partner community are what get replies. If you've sold outsourcing, staff augmentation, or white-label delivery before, you already understand the objections.
What you'll do
Build targeted lists of US Microsoft partners and data/BI consultancies
Run outbound outreach (email, LinkedIn, calls) positioning our white-label delivery
Handle trust, data-security, and "why offshore" objections
Qualify interest and book intro calls with delivery/practice decision-makers
Track pipeline and report on outreach and results
You should have
Based in the United States with a US phone number (required)
B2B business development, channel, or partnerships experience
Strong plus: experience selling outsourcing, staff augmentation, or white-label IT/consulting services
Familiarity with the Microsoft partner ecosystem
Strong, professional written outreach in English
Comfort coordinating across time zones with an India-based team
Budget:
not specified
54 minutes ago
Sales & Marketing, Lead Generation & Telemarketing
APAX is an EVM platform for tokenizing precious metals (gold, silver, platinum) with a strong focus on compliance and governed asset transfer.
We are developing a demo. The Next.js UI is largely built (landing, login, dashboard views) but runs on mocked Zustand data. The Express + Mongo backend is partially scaffolded but not production-ready (auth and DB wiring incomplete). There is a basic ERC-20 style token on Sepolia; we still need real wallet integration, on-chain reads/writes, and a compliance-oriented contract path (ERC-3643 style identity / transfer restrictions).
We are hiring for FULL end-to-end delivery by the same engineer (or a small team you lead), not frontend-only or backend-only work.
What you will deliver
1) Frontend: replace mocked dashboard data with live APIs; proper loading/error states; auth-aware routes; registration if needed
2) Backend: Express + MongoDB + JWT (prefer HttpOnly cookies), protected routes, stable REST APIs, persist balance/activity (currently in-memory)
3) Blockchain: Solidity + Hardhat/Foundry, ethers.js or wagmi/viem wallet connect, on-chain balance/holder flows, extend beyond basic ERC-20 toward compliance/tokenization needs
4) Quality: clean feature-branch delivery, tests where it matters, security-minded code (no shortcuts on auth or contracts)
Stack
Next.js, React, TypeScript, Tailwind/shadcn, Zustand (to be replaced), Node.js, Express, MongoDB/Mongoose, JWT, Solidity, Hardhat, OpenZeppelin, ethers.js / viem / wagmi, Chainlink awareness a plus
To apply, please include
- GitHub username
- 1–2 links showing Next.js + Express/Mongo (or very close) AND Solidity/web3 work
- Hourly rate or fixed quote for full delivery
- Hours per week
- Realistic timeline for end-to-end delivery
Client's questions:
Share your GitHub and 1–2 links that prove both (a) Next.js + Express/Mongo/JWT and (b) Solidity or wallet/web3 integration.
Have you shipped HttpOnly-cookie JWT auth and protected routes in production? Briefly describe.
Describe one project where you connected a React/Next UI to smart contracts (ethers.js, viem, or wagmi). What did you build?
What is your hourly rate, weekly availability, and realistic timeline for full end-to-end delivery (UI + API + blockchain)?
Are you applying as an individual or agency? If agency, who writes the code (name + GitHub)?
AI Engineer - Agentic Automation & LLM Integration
Applied
$35 - $50
/ hr
1 hour ago
Client Rank
- Medium
Payment method verified
6 jobs posted
1 open job
no reviews
Company size: 10
Registered: Aug 5, 2020
France
17:52
3
We are looking for an experienced AI engineer to help us design and ship production-grade agentic AI systems for clients across multiple industries. The goal is to move beyond simple chatbot wrappers and build tool-using agents that execute real multi-step workflows, integrate with existing business systems, and hand back reliable, structured results.
Responsibilities:
Design and build agentic workflows using LangChain - planning, tool-calling, multi-step reasoning.
Build RAG pipelines: chunking, embeddings, retrieval tuning, and grounding outputs in real client data.
Connect agents to existing business systems (CRMs, internal APIs, databases) and automation tools like n8n.
Build the supporting full-stack layer so agents are usable, not just scriptable.
Implement guardrails, logging, and human-in-the-loop approval where accuracy matters.
Requirements:
Proven experience shipping production LLM/agent systems
Strong Python, hands-on experience with LangChain or equivalent frameworks, and OpenAI/Anthropic API integration.
Full-stack experience
Practical understanding of RAG architecture and vector databases (pgvector, Pinecone, or similar).
Comfortable working directly with clients
When submitting your application, please include examples of live or shipped AI agent/RAG projects, the stack used, and your role in each.
AI Agent Engineer (RAG + Multi-Agent Systems)
Applied
not specified
1 hour ago
Client Rank
- Medium
Payment method verified
Phone number verified
11 jobs posted
2 open job
no reviews
Registered: Dec 18, 2023
United Kingdom
15:52
3
We are looking for an AI engineer to build an internal AI-powered strategy assistant for marketing company. It must combine our internal resources with publicly available internet data to help our team work faster and produce higher-quality strategies.
The AI should be able to:
-Search and reason over our historical campaign data (RAG).
-Analyze a brand's website and social media presence to identify tone of voice, visual style, content pillars, posting cadence, and previous influencer collaborations.
-Generate campaign concepts, creative ideas, and influencer recommendations based on our historical knowledge.
-Research competitors and identify seasonal marketing patterns.
-Monitor social trends and surface emerging opportunities relevant to brands and creators.
-Assist in creating campaign proposals and strategic briefs.
Preferred Technical Experience:
-Python
-LLMs (OpenAI, Anthropic, Gemini)
-RAG architecture (LangGraph, LangChain, or LlamaIndex)
-Vector databases (Pinecone, Qdrant, Weaviate, or pgvector)
-AI agent frameworks
-Web crawling and structured data extraction
-API integrations
-Prompt engineering
-Experience building production AI applications
Deliverables:
-AI architecture design
-Working multi-agent system
-RAG pipeline connected to our campaign library
-Brand research and analysis agent
-Creative strategy and ideation agent
-Documentation and deployment guidance
No need of cover letter. Please include examples of similar AI agents, RAG systems, or knowledge assistants you've built, along with the technologies you used and your role in the project.
B2B Sales & Lead Generation Audit + Strategy for Construction Staffing Startup
Applied
$25 - $45
/ hr
1 hour ago
Client Rank
- Medium
Payment method verified
Phone number verified
2 jobs posted
1 open job
no reviews
Registered: Dec 4, 2025
United States
09:52
3
We are Remotation, an Employer of Record (EOR) staffing company serving US civil engineering and construction firms. We place offshore engineers, CAD drafters, BIM specialists, and other AEC professionals with US-based construction companies.
We currently have a cold calling and email outreach operation in place but want to optimize our process and improve results. We need an expert to audit our strategy and execution, then help us scale effectively.
What we need you to do:
Audit our current cold calling process (review scripts, call recordings, SDR approach)
Review our target list and ideal customer profile
Identify optimization opportunities and bottlenecks
Provide a corrective action and improvement plan
Help implement fixes
You should have:
Proven experience with B2B lead generation and cold outreach optimization
Track record of improving conversion rates and response rates
Portfolio/case studies showing results
Experience with construction, staffing, or recruiting industries (preferred but not required)
Ability to provide direct, actionable feedback
Hourly rate:
25 - 45 USD
1 hour ago
Sales & Marketing, Lead Generation & Telemarketing
Role Overview:
We’re looking for a Data Automation Engineer who is strong in data analysis and can also build and manage automated data systems. You’ll work with data from various marketing and business platforms, connecting different tools and systems so data flows automatically without manual work, while using that data to generate meaningful analysis and insights.
Key Responsibilities
-Analyse data from connected platforms to generate insights and support business decisions – this is the core focus of the role.
-Build and maintain automated workflows using tools like Zapier, Make.com, or similar, connecting different systems and data sources through connectors and links.
-Own the ETL process – extract, clean, standardise, and load data into a central database.
-Use AI tools like Claude Code to support automation and data workflow tasks.
-Maintain and improve the overall data setup as data volume and requirements grow.
Must-Have Requirements
-Strong hands-on data analysis skills – this is the primary requirement for the role.
-Hands-on experience with automation tools like Zapier, Make.com, or similar, including setting up connectors and integrations between different platforms.
-Good working knowledge of the ETL process – extracting, cleaning, standardising, and loading data.
-Hands-on experience using Claude Code.
-Working knowledge of databases such as Supabase, PostgreSQL, BigQuery, or Snowflake.
-Basic understanding of marketing data (e.g., Google Ads, Meta Ads metrics) as a general example of the type of data you may work with.
Fixed budget:
1,000 USD
1 hour ago
Data Science & Analytics, Data Mining & Management
HVAC Mechanical Engineer Needed for Project
Applied
$25
1 hour ago
Client Rank
- Good
Payment method verified
Phone number verified
$2 505 total spent
3 hires, 2 active
3 jobs posted
100% hire rate,
1 open job
5.00
of 1 reviews
Registered: Mar 23, 2025
United Arab Emirates
Dubai
14:52
4
We are seeking an experienced HVAC Mechanical Engineer to oversee the design and implementation of heating, ventilation, and air conditioning systems for our upcoming project. The ideal candidate will have a strong background in HVAC system design, energy efficiency, and project management. Responsibilities include assessing project requirements, conducting load calculations, and ensuring compliance with industry standards. If you are detail-oriented and possess excellent problem-solving skills, we would love to hear from you.
Fixed budget:
25 USD
1 hour ago
Engineering & Architecture, Energy & Mechanical Engineering
We are Letmehired LLC, a IT Services and IT Consulting based in Delaware with more than 5 years of professional software development experience.
https://letmehired.com/
Our team consists of experienced software engineers working across modern web, cloud, DevOps, AI, and enterprise software projects. As our business continues to grow, we are looking for a long-term Technical Interview Partner who can participate in client meetings, technical discussions, and project discovery sessions while representing our engineering capabilities in a professional and technically accurate manner.
### Responsibilities
* Participate in introductory meetings, technical discussions, and engineering interviews with prospective clients.
* Communicate confidently with recruiters, hiring managers, engineering teams, and stakeholders.
* Thoroughly understand our engineering team's technical capabilities, project experience, architecture decisions, and development methodologies.
* Explain technical solutions, implementation approaches, and engineering best practices clearly and professionally.
* Assist with technical discovery, requirement clarification, and project discussions during the hiring process.
* Record meetings for internal knowledge sharing when permitted.
* Build a long-term working relationship with our team (approximately 4–5 years).
### Requirements
* Excellent spoken and written English communication skills.
* Strong software engineering knowledge across modern development technologies.
* Confidence participating in live video meetings.
* Ability to quickly learn project details and communicate them accurately.
* Professional appearance and communication skills during client meetings.
* Interest in a stable, long-term collaboration.
### What We Provide
* Comprehensive onboarding and technical preparation.
* Access to project documentation, engineering resources, and technical references.
* Ongoing mentorship and technical guidance.
* AI-powered productivity tools to support meeting preparation.
* Continuous collaboration with our senior engineering team.
### Compensation
* $30/hr ~ $60/hr
* Additional performance bonuses based on successful client engagements and long-term collaboration.
Convert Existing Slab Foundation Plan to a 9-Foot Basement & Complete Construction Plan Package
Applied
not specified
1 hour ago
Client Rank
- Medium
Payment method verified
Phone number verified
1 jobs posted
100% hire rate,
1 open job
no reviews
Registered: Jun 19, 2026
United States
Rochester
09:52
3
Project Request: Convert Existing Slab Foundation Plan to a 9-Foot Basement & Complete Construction Plan Package
Good morning,
I hope you’re doing well. I am reaching out because we need help modifying our existing house blueprints. The current plans were originally designed with a slab foundation, but we have decided to change the design to a full 9-foot basement. We would like to continue using the existing floor plan as much as possible while redesigning everything necessary to accommodate the basement.
Our highest priority is the basement foundation plan. We need this completed as soon as possible because the basement contractor cannot provide an accurate estimate or begin construction until they have a detailed foundation drawing. If possible, we would greatly appreciate having this completed within five days, or at least within one week.
The foundation plan should include all structural details required for construction, including but not limited to:
* Complete 9-foot basement foundation layout based on the existing floor plan.
* Footing sizes, wall thicknesses, dimensions, elevations, and all required measurements.
* Foundation wall details, reinforcing steel (rebar) schedule, anchor bolts, and structural notes.
* Steel beam and support beam locations.
* Basement columns, posts, load-bearing walls, and point load locations.
* Floor support system and all required structural connections.
* Any required details needed for permits and construction.
Because we are changing from a slab to a basement foundation, we also need one layout change. The current rear covered porch will become finished living space so the basement can extend underneath that area. We would like to relocate the covered porch farther into the backyard. This change will also allow us to place the basement staircase near the rear of the house, which will create a better layout for the basement. I can explain this modification more clearly during a Zoom meeting and provide sketches or marked-up drawings if needed.
After the foundation plan is complete, we would also like assistance with the remaining construction plans, including:
* Floor framing plan.
* Open-web floor truss layout and engineering coordination.
* Beam sizes and structural support details.
* Plumbing layout for the basement and main floor.
* Water supply, drain, and vent locations.
* Electrical layout, including panel location, circuits, outlets, switches, lighting, and basement wiring.
* HVAC layout if required.
* Utility coordination and any additional construction details needed for a complete building set.
Our goal is to have a complete and buildable set of plans that contractors can follow with confidence during construction. We want to make sure everything is properly designed before work begins so the project can move forward smoothly.
Please let me know if you are available to take on this project and whether you can meet our requested timeline. If needed, I would be happy to schedule a Zoom meeting to go over every detail and answer any questions. I can also provide the current blueprints, reference photos, sketches, and any additional information you may need.
Thank you very much for your time. We look forward to working with you and appreciate your help with this project.
Budget:
not specified
1 hour ago
Engineering & Architecture, Interior & Trade Show Design
We have built a computer-adaptive reading benchmark and we need someone to tell us where the measurement is wrong.
It is a placement and growth instrument, K–12, taken once at intake and then two or three times a year. Item response theory, per-language model selection, EAP ability estimation, Fisher-information item selection, a precision-based stopping rule, exposure control, and a growth model with significance testing. It is calibrated on a large multi-year response corpus. The specification is written for an engineer and runs to about twenty pages.
It has been through two independent research passes and an internal review. It has not been read by a psychometrician.
That is this job. We want someone who reads the measurement engine and says "that assumption is unsupported, that estimator does the opposite of what you think at the tail, and that bank cannot sustain that exposure policy." We are not looking for validation. We are looking for the things we cannot see.
What you would actually do
Read the specification and mark it up. All of it, then a second pass at the whole-instrument level. We care about two things: whether each decision is defensible on its own, and whether the decisions are coherent together.
The areas we most want examined:
Model selection per language, and the assumptions carried across languages
Ability estimation and what it does at the extremes of the distribution
Item selection, exposure, and whether the bank can support the policy
The stopping rule and how the precision target should actually be set
Calibration pipeline, parameter recovery, fit and drift
Growth measurement, and what is honestly detectable at the individual level
The validation design — whether it would survive an independent technical review
Deliverable. Comments against numbered sections, plus a short written summary of the instrument-level problems. Direct English, no formatting ceremony. Where you disagree, say what you are disagreeing from — a paper, a standard, or specific experience building or maintaining one of these.
Timing. First pass inside two weeks. If the fit is wrong we will both know from the first few sections.
Who we are looking for
You have built, calibrated or maintained an item bank or an adaptive test. Not read about one.
Fluent in IRT parameter estimation (MML/EM or Bayesian), item selection algorithms, exposure control, scale linking or vertical scaling, and DIF.
You have opinions about 3PL guessing-parameter stability, about when EAP is the wrong estimator, and about what a small bank does to an exposure policy.
Comfortable with the tooling — R (mirt, catR, TAM), flexMIRT, IRTPRO, BILOG, Winsteps, Stata, or equivalent. We do not care which; we care that you have used one in anger.
Backgrounds that often fit: psychometrician or measurement scientist at a testing organisation or assessment publisher; educational measurement academic; someone who has run a state or certification testing programme; a statistician who has worked on latent variable models in an assessment context.
Who this is not for
Machine-learning practitioners who see this as a bandit or recommendation problem. It is a measurement problem with defensibility requirements — a district challenging a child's placement is the design constraint.
General data scientists without IRT experience.
Reading specialists. We have those. This role is measurement.
Anyone who needs the brief re-explained before having a view.
Terms
Remote, asynchronous, your own hours. NDA before the full specification is shared. Ongoing work available — this is the first of several review passes, and the same person would be our standing measurement reviewer through calibration and validation.
THE EXTRACT
(Include this verbatim in the posting. Copied unedited from our specification. The screening questions refer to it.)
Model, per language. One engine, three maturities. English: 3PL — discrimination, difficulty and guessing all estimated. Hindi: 2PL — difficulty estimated, discrimination borrowed from the English twin item, guessing omitted. Spanish: 1PL — difficulty estimated, discrimination fixed at a = 1, guessing omitted. Language is a data-maturity setting, not a code fork.
Ability estimation. EAP (Expected A Posteriori). The prior is set from the child's enrolled grade. Finite and stable at the extremes where MLE diverges, and converges faster from a grade-informed start.
Item selection. Maximum Fisher information at the current θ, drawn randomesque from the top 5–10 most informative items. Wrapped in Sympson-Hetter exposure control plus a-stratification.
The stopping rule (the one tunable knob). Stop when SE(θ) ≤ 0.30 logits (≈ 0.90 marginal reliability). Floor: at least ~8 items before stopping is allowed. Ceiling: cap at ~25 items regardless, for fatigue. Open decision in our spec: "the precision target is a placeholder… Steven to tune it to a product spec (e.g. place within ½ a grade band, 95% of the time), which maps to a specific SE once the Lexile linking constants are fixed."
Section 13 of the same document is titled: "Outputs — the grade scale (no Lexile)."
The bank. 288 items, roughly 32 per grade band. Twelve are already flagged for retirement, eight of them because they sit at or below the four-option guess floor. Administered 8–25 items per sitting, two to three sittings per year, per child.
Growth. Change between benchmark windows is significance-tested against the combined standard errors of the two estimates, rather than reported as a raw difference.
Client's questions:
288 items, ~32 per grade band, 8-25 administered per sitting, three sittings a year, with Sympson-Hetter and a-stratification on top. What breaks first, and what would you do about it?
Our stopping rule is SE ≤ 0.30 logits, with a floor of 8 items and a ceiling of 25. Our own spec calls the 0.30 a placeholder. How would you set that number properly? Why should we hire you?
We use EAP with the ability prior set from the child's enrolled grade, over a test of 8-25 items. What are the consequences, and would you change it? Which other selection methods would you have considered, and why did you rule them out?
One engine runs 3PL for English and 1PL for Spanish with a fixed at 1. Both use the same SE ≤ 0.30 stopping rule. What does that mean for two children who stop at the same SE?
Calibration returns a negative discrimination on an item your content team is certain is good. It has 4,000 responses. What do you check, and in what order? We select by maximum Fisher information, randomesque from the top five, on an 8-25 item test.
Request for Quote – Reverse Engineering of Analog Chronotachygraph
Applied
not specified
1 hour ago
Client Rank
- Risky
Payment method not verified
4 jobs posted
1 open job
no reviews
Company size: 10
Registered: Nov 19, 2020
Morocco
Casablanca
16:52
1
I hope this message finds you well.
To begin with, let me briefly explain what an analog chronotachygraph is, as this may help you better understand the scope of our request.
An analog chronotachygraph (commonly known as an analog tachograph) is a mechanical recording device historically used in heavy vehicles such as trucks, buses, and coaches to monitor driving activity. It simultaneously records two types of information on a rotating paper disc: vehicle speed (via a flexible cable connected to the gearbox or gearbox output) and driving time / rest periods (via a mechanical clockwork mechanism and a stylus that moves radially). The device is purely mechanical: it contains a precise gear train, a centrifugal speed governor, a clockwork motor, levers, springs, and recording styli. All these components are enclosed in a robust housing designed to withstand vibration, temperature variations, and tampering attempts. Today, this equipment is obsolete and has been replaced by digital versions. However, we have a specific need to understand, reproduce, or modernize this mechanical system. Unfortunately, no original technical drawings or CAD files are available for this particular model.
We are currently looking for a competent engineering firm capable of performing a complete reverse engineering process on this analog chronotachygraph, focusing specifically on:
The mechanical assembly (gears, springs, levers, linkages, shafts, bearings, centrifugal governor, clockwork motor, recording stylus mechanism, etc.).
The external housing / casing (dimensions, materials, sealing, fastening points, front face, glass, connectors, mounting brackets, etc.).
Our objectives are as follows:
Understand the exact mechanical functioning and kinematics of the entire system.
Produce accurate 3D CAD models (solid and surface) of all mechanical parts and the housing.
Possibly propose improvements (durability, maintenance, weight reduction, etc.) or prepare for a potential redesign / remanufacturing.
Regarding the physical samples, we are able to provide you with the entire mechanical assembly and the housing in their entirety, fully disassembled or assembled as you prefer. In addition, we can supply functional videos showing the device in operation, so that you can clearly observe the kinematics, the movement of each component,
Budget:
not specified
1 hour ago
Engineering & Architecture, Energy & Mechanical Engineering
Full Stack AI Developer needed to fix and improve an existing RAG - based pipeline
Applied
$200
1 hour ago
Client Rank
- Excellent
Payment method verified
Phone number verified
$3 778 total spent
56 hires, 5 active
78 jobs posted
72% hire rate,
18 open job
4.99
of 45 reviews
Industry: Tech & IT
Company size: 10
Registered: Mar 23, 2023
United States
Arizona
17:52
5
We are looking for an experienced full-stack AI developer proficient in RAG and LLM integration for a short-term task. You will be responsible for auditing, debugging, and improving the retrieval accuracy of our current implementation. We are specifically seeking someone who has shipped real production RAG systems and successfully resolved latency and context precision issues.
You must have strong expertise with VectorDBs (Pinecone, ChromaDB), embedding-based retrieval, hybrid search, re-ranking, and advanced prompt engineering. Our current setup uses Python, OpenAI's API, and a vector database - the issues are mainly around context relevance, retrieval precision, and inconsistent or hallucinated answers when processing documents with highly similar content.
To apply, please share a concrete example of a production RAG system you have developed, along with your immediate availability to start this week.
We're looking for an experienced data engineer to build our HR people-data platform in Snowflake. You'll create a dedicated HR database within our organization's existing Snowflake account, build API integrations to sync confidential HR/people data from our source systems, model that data into usable tables, and design the security layers that control access. Since this involves sensitive employee data, secure-data experience is essential.
WHAT YOU'LL DO
Build and maintain API integrations that sync data from our HR systems into Snowflake: UKG Pro (formerly UltiPro), Lattice, Keka, Qualtrics, ChartHop.
Model raw source data into clean, consistent, query-ready tables for the HR team.
Design and implement the layered security model below.
Validate data (reconciliation + QA) with reliable, scheduled refreshes, and document the pipelines and process.
GOAL
Give the people data & systems team one trusted home for people data: a dedicated HR database in our existing Snowflake account, fed by reliable integrations from all our HR systems (UKG Pro, Lattice, Keka, Qualtrics, ChartHop), modeled into clean and consistent tables, and secured with role-based access so the right people see the right data.
SECURITY & ACCESS LAYERS (key requirement)
Security architecture is central to this role. You'll design a documented, enforceable access model with the following layers:
Carve-out within existing account - the company already runs on Snowflake, so this HR database sits within our existing company-wide account.
HR vs. org - HR/people data is walled off to the HR team and not exposed to the wider organization by default.
Tiers within HR - role-based access inside HR, so sensitive fields (comp, performance, PII) are limited to need-to-know rather than visible to all of HR.
Hourly rate:
15 - 38 USD
1 hour ago
Data Science & Analytics, Data Mining & Management
Logo + A6 Note Card + T-Shirt + Social Banners for AI SaaS
Applied
$300
1 hour ago
Client Rank
- Good
Payment method verified
$1 003 total spent
4 hires, 4 active
4 jobs posted
100% hire rate,
2 open job
17.81 /hr avg hourly rate paid
56 hours paid
4.87
of 4 reviews
Registered: Jul 10, 2021
Estonia
Tallinn
16:52
4
Scope:
- Logo (primary mark + wordmark, light/dark variants)
- DIN A6 note card (for handwritten notes, print-ready)
- T-shirt design (front print, mockup included)
Social media banners:
- LinkedIn company page cover (1128 x 191 px, design safe for the logo overlap on the left)
X/Twitter header (1500 x 500 px, keep key content centered; edges crop on mobile)
Profile picture / avatar export of the logo (square + circular crop safe, works at 48 px)
Deliver as PNG plus editable source, so text can be swapped later
Brand brief:
dearmachines (dearmachines.com) is an AI QA agent: it writes tests, runs regressions, and catches bugs so software teams can ship faster. Audience: developers, CTOs, and engineering leads at SaaS companies.
The name evokes a friendly letter addressed to machines ("dear machines, ..."). The logo should feel technical and modern but approachable, and that warmth can carry into the mark. Think dev-tool brands (Linear, Vercel, Raycast) rather than corporate tech.
Constraints: must work as favicon, in one color, and embroidered.
SaaS Mid/Senior Laravel Engineer for Project Development and Modernization
Applied
$15 - $25
/ hr
1 hour ago
Client Rank
- Excellent
Payment method verified
$124 488 total spent
36 hires, 9 active
43 jobs posted
84% hire rate,
1 open job
27.84 /hr avg hourly rate paid
3 973 hours paid
4.97
of 25 reviews
Industry: Food & Beverage
Company size: 2
Registered: Jan 7, 2014
United Kingdom
Anstey
15:52
5
We are looking for a skilled, forward-thinking engineer to help us take our core platform to the next level. This is not just a maintenance gig—it is an exciting opportunity to breathe new life into a legacy codebase, migrate it to modern standards, and build out high-impact, critical business features that will directly drive our growth.
We’re looking for someone that brings their own experience and ideas, coupled with a strong desire to improve the codebase they’re working on. If you want to just turn up and complete Jira tickets then this isn’t the role for you!
Responsibilities
Team Collaboration: Work closely with our Engineering Manager and a cross-functional development team to align on technical specs, estimate tasks, and deliver sprint goals. You will act as an extension of our in-house team and work alongside them day-to-day
Modernization & Refactoring: Gradually refactor and migrate legacy PHP/Laravel code to the latest Laravel version, ensuring high performance, security, and scalability.
Continuous Improvement: Constantly review, refactor, and level up both existing legacy code and your own new contributions to maintain a highly maintainable, modern architecture.
Code Quality & Testing: Experience writing comprehensive automated tests (PHPUnit/Pest), participating in constructive peer code reviews, and champion quality assurance (QA) practices to keep our main branch rock-solid.
Feature Development: Build critical business tools, custom APIs, and user-facing featureS.
Database Optimization: Audit, optimize, and streamline our MySQL database queries to improve platform speed and responsiveness.
Client's questions:
Describe your approach to testing and improving QA
Describe your recent experience with similar projects