Find Blockchain Projects with Vollna

About the Opportunity
We are a Web3 development team currently building a cutting-edge crypto betting website that leverages decentralized technology to deliver a transparent, secure, and engaging user experience. Our platform integrates onchain logic with a modern frontend interface, and we are in the active development phase. Due to accelerating project timelines, we are seeking an experienced Smart Contract Developer to architect, build, and deploy the onchain infrastructure that powers our betting platform.
This is a remote engagement with a clear pathway to a long-term partnership, contingent upon demonstrated performance and mutual fit.

Core Responsibilities
Design, develop, and deploy secure and gas-optimized Solidity smart contracts for betting logic, escrow mechanisms, and token interactions on EVM-compatible chains.
Implement staking mechanisms, reward distribution, and betting pool management contracts.
Ensure all smart contracts follow security best practices, including protection against reentrancy, overflow, access control vulnerabilities, and front-running.
Write comprehensive unit, integration, and fuzz tests using Foundry and/or Hardhat to ensure contract correctness and security .
Conduct gas optimization and storage layout analysis to minimize transaction costs for users.
Collaborate with frontend and backend engineers to ensure seamless integration between smart contracts and web application components.
Participate in code reviews, threat modeling, and audit preparation .
Provide bi-weekly progress reports to the Project Manager, ensuring transparency and alignment with project milestones.
Stay current with EVM upgrades, EIPs, and emerging security patterns relevant to onchain betting platforms.

Required Qualifications
Proven professional experience developing and deploying Solidity smart contracts on EVM-compatible chains (Ethereum, Polygon, BSC, Arbitrum, etc.) .
Strong understanding of EVM execution model, including opcodes, calldata/memory/storage management, and delegatecall patterns .
Proficiency with Foundry and/or Hardhat for compilation, testing, and deployment .
Deep knowledge of common token standards: ERC-20, ERC-721, ERC-1155, and relevant EIPs (EIP-2612, EIP-712) .
Solid grasp of security best practices: access control, rate limiting, pull-over-push payments, checks-effects-interactions, and pause/guardian patterns .
Experience with upgradeable contract patterns (UUPS, Transparent Proxy) and their security implications .
Familiarity with onchain randomness solutions (Chainlink VRF) for provably fair betting mechanics .
Proficiency with Git, code reviews, and collaborative development workflows.
Excellent problem-solving skills and ability to work independently in a remote environment.
Strong communication skills to articulate technical decisions and security considerations clearly.

Preferred Qualifications:
Experience with crypto betting, gambling, or gaming platforms.
Knowledge of MEV protection strategies and private mempool usage .
Familiarity with cross-chain bridge security considerations.
Experience preparing for and responding to third-party security audits.
Understanding of tokenomics and staking reward mechanisms.

Compensation & Benefits
We offer competitive compensation aligned with 2026 market rates for senior smart contract engineering talent. Based on current market data, senior smart contract developers in the United States earn an average annual salary of $173,447**, with senior-level professionals (8+ years) commanding up to **$200,518 annually . In Virginia, the median annual wage is $129,239**, equivalent to approximately **$61.65/hour . On freelance platforms, rates for senior blockchain engineers range from $80–$150/hour on vetted marketplaces, with top-tier independent contractors reaching $120–$250/hour

Our Offer Includes:
Hourly Rate: $80 – $140/hour (commensurate with experience, location, and demonstrated expertise)
Role Type: Remote – Full-time (30–40 hrs/week) or part-time (20+ hrs/week), based on your preference and availability
Trial Engagement: 1–2 weeks of paid onboarding at full rate to validate skills and collaboration fit
Long-Term Contract: Upon successful completion of the onboarding stage, we are pleased to discuss a long-term contract tailored to your contribution level
Growth Potential: High-performing candidates will be considered for extended collaboration as we scale our platform and ecosystem

Our Hiring Process
We have designed a structured, transparent, and merit-based evaluation process to ensure alignment with our technical standards and team culture:
Technical Skill Assessment – A practical GitHub-based task will be shared to evaluate your capabilities, including contract development, testing, and security considerations. Full instructions are provided in the accompanying README file.
Interview Rounds – Following the assessment, selected candidates will participate in 2–3 rounds of interviews, covering technical depth, security awareness, architectural thinking, and cultural fit.
Paid Onboarding Stage – Shortlisted candidates will be invited to a 1–2 week paid trial engagement. This phase allows us to collaboratively validate your skills, working style, and integration into our development workflow.
Long-Term Engagement – Upon successful completion of the onboarding stage, we are pleased to discuss a long-term contract tailored to your availability and contribution level.

Application Instructions
To apply, please submit your Upwork proposal including:
A concise summary of your relevant experience, particularly with Solidity, EVM development, and security best practices.
Links to your GitHub profile, relevant repositories, and/or deployed smart contracts (mainnet deployments with audit history are highly valued).
Your availability (hours per week) and preferred working time zone.
Any examples of previous work involving crypto betting, gambling, DeFi, or gaming platforms (highly valued).
Upon review, shortlisted candidates will receive the skill assessment details and an invitation to schedule their first interview.

We’re looking for a talented Frontend Engineer to join our Web3 project and help build a modern, user-friendly decentralized application.

Requirements:

- Strong experience with React / Next.js
- Proficiency in TypeScript and JavaScript
- Experience with Web3, wallets, and blockchain integrations
- Familiarity with ethers.js, viem, or wagmi
- Good understanding of responsive UI and frontend architecture
- Experience working with Git and modern development workflows

What we offer:

- Remote opportunity
- Work on an innovative Web3 product
- Collaborative engineering environment
- Competitive compensation

📩 Interested? Send me a DM with your GitHub/portfolio and a brief overview of your Web3

I need in-depth research and polished ghostwriting for a sequence of blog posts centred on health and wellness. Although the core theme is wellbeing, I want every piece to weave in emerging technology so the articles feel fresh, authoritative, and future-focused.

The specific tech areas I expect you to reference are:
• Artificial Intelligence
• Cybersecurity
• Blockchain

For each post, gather credible, up-to-date sources, distil the key insights, and craft an engaging narrative that a general audience can follow without losing scientific or technical accuracy. Tone must stay friendly and informative, with smooth SEO integration of our primary keywords.

Deliverables
• Fully written blog articles (ready to publish, with headlines, sub-headings, and meta description)
• A brief citation list or footnotes so I can verify all facts and figures

I will review a short outline for every topic before you write the full draft, then request one revision round to fine-tune style or structure if needed. Plagiarism-free, well-researched content is non-negotiable; I will check every piece before sign-off.

If you are comfortable balancing health expertise with clear explanations of AI, cybersecurity, and blockchain concepts, this project should be a perfect match.

Skills: SEO, Research, Blog, Ghostwriting, Article Writing, Content Writing, Blockchain, Blog Writing

I’m ready to move our hybrid DeFi infrastructure from concept to production and need a senior architect who can own the full cross-chain routing stack end-to-end. The core networks in scope are Base (EVM), Solana (SVM) and Sui (Move). On top of that, the platform must expose ERC-4337 account-abstraction rails so we can offer completely gas-free user flows.

Key functional pillars
• Biometric onboarding through WebAuthn so retail users glide straight from KYC into non-custodial wallets.
• True gasless execution driven by ERC-4337 paymaster flows.
• Hardware middleware automation via CEN/XFS drivers to let ATMs, kiosks and embedded banking devices push transactions directly into our rails.

I already run an AI-native development environment (Cursor, Copilot, GPT-powered test generation) and expect you to orchestrate these agents rather than rely on traditional manual loops. Formal verification, differential fuzzing and static-analysis gates need to run automatically on every commit.

What you will hand over
1. A modular routing engine that detects the cheapest path across Base, Solana and Sui in real time and executes atomically.
2. Smart-contract libraries (Move & Solidity) formally verified, with proofs or audit artefacts.
3. A biometric onboarding micro-service that speaks WebAuthn and mints ERC-4337 accounts on demand.
4. CEN/XFS middleware service bridging hardware events to the routing engine.
5. CI/CD pipeline scripts plus IaC for rapid redeploy to our Kubernetes cluster.
6. Complete test coverage: unit, integration, property-based and load tests showing 1 000 TPS at <300 ms median latency.

Code quality, provable security and clear documentation are non-negotiable. If you thrive in a high-velocity, AI-assisted workflow and can ship production-grade systems that scale globally, let’s talk deliverables and timelines.

Candidates must demonstrate master-level proficiency in the following precise technological frameworks:1. Smart Contract & Core Ledger DevelopmentEVM Chains: Advanced Solidity and low-level Yul Assembly (explicitly required for memory-allocation gas optimization inside our Paymaster contracts).SVM Chains: Rust paired with the Solana Anchor framework (optimized for high-performance, parallel transaction architectures).Move Chains: Move Language natively tailored for the Sui Network (leveraging object-based data structures for parallel computation).Development Frameworks: Foundry, Hardhat, and Solana CLI tools.2. Cryptographic Authentication & Account Abstraction LayerERC-4337 Architecture: Proven deployment of custom smart accounts, alternative mempool validation loops, EntryPoint contracts, and gas-sponsoring Paymaster contracts.AA Toolkits: ZeroDev Kernel, Biconomy SDK, and UserOperation bundler integration frameworks.Keyless Onboarding Engine: Comprehensive integration of the WebAuthn API to interface with device-level physical security chips (Secure Enclave on iOS, TEE on Android). Native integration of Turnkey SDK or Capsule SDK for secp256r1 elliptic curve key orchestration.3. High-Velocity Payment Middleware & Cross-Chain ClearingCross-Chain Interoperability: Hands-on integration of Circle’s Cross-Chain Transfer Protocol (CCTP) APIs to handle programmable, instant minting and burning of stablecoins (USDC/EURC) directly on-chain.Transaction Surveillance: Live integration of Chainalysis KYT (Know Your Transaction) APIs and automated mempool transaction parsing webhooks.4. Hardware Edge Middleware & Simulation AutomationATM/Kiosk Integration: Experience or working knowledge of the international banking CEN/XFS 3.0 driver standard protocol to control automated currency deposit cassettes and security document printers.Biometrics Integration: FaceTec 3D Face Verification SDK and infrared device camera driver hooks.5. AI-Native Tooling & Cybersecurity AuditingAI Code Acceleration: Absolute fluency in Cursor IDE, GitHub Copilot Enterprise context indexing, and prompt engineering protocols.Autonomous Security Testing: Deep experience configuring automated static analysis and fuzzing agents via Slither, Echidna, Mythril, and CertiK Skyfall/Foundry formal verification suites.Simulation Environments: Experience mapping multi-agent synthetic user networks via LangGraph or CrewAI to execute pre-launch stress-testing.

Skills: Blockchain, Documentation, Rust, Solidity, Smart Contracts, Microservices, CI/CD, AI Development, Hardhat, Security Auditing

I need a robust transaction-management module that can reliably process financial transactions in cryptocurrencies. The core requirement is seamless support for sending, receiving, and reconciling crypto payments inside my existing web platform. Right now the only payment rail I must have is cryptocurrency; however, I would like the code structured flexibly so I can add card or bank-transfer rails later without a major refactor.

Security, auditability, and clear error handling are non-negotiable. Please build with well-maintained blockchain libraries or SDKs (e.g., web3.js, ethers.js, or equivalent in Python/Go if you prefer) and follow best practices for key management. All balances, fees, and transaction hashes need to be recorded in an SQL or no-SQL store that I can query for reporting.

Deliverables
• Clean, documented source code for the transaction manager
• Database schema and migration scripts
• A brief setup guide plus cURL or Postman collection that demonstrates a full transaction lifecycle (initiation, confirmation, settlement)
• Short hand-off call or video walkthrough once everything is deployed to my test server

I’ll supply API keys and server access once we agree on the tech stack. Let me know your preferred language, any previous crypto-payment projects you’ve completed, and an estimated timeline to reach a testable MVP.

Skills: PHP, JavaScript, Python, Software Architecture, Virtual Assistant, Digital Design, Blockchain, Web3.js, Ethers.js

I am looking for a production-ready flash-loan bot that reliably fires only when a genuine profit window appears, then executes in a single block with minimal gas waste and virtually zero reverts. The core use-case spans every lucrative angle—arbitrage, liquidations, and any price discrepancy you can surface—so the logic should be broad enough to sweep all three or more automatically.

Key integrations I need out of the box are:
• Balancer (leveraging its fee-free flash-loans)
• Uniswap (for deep liquidity routing)
• Aave (for additional sourcing or exit liquidity)

The bot must sit idle until an executable spread occurs, immediately borrow via Balancer, route through the optimal pools, repay within the same transaction, and surface the profit to my wallet. Speed and reliability are non-negotiable; I expect a proven track record—transaction hashes, on-chain analytics, or a test-net video—showing consistent wins and a negligible revert rate.

Deliverables:
1. Full source code with inline comments and clear environment variables.
2. Deployment scripts plus a concise README so I can spin up the bot, define profit thresholds, and start/stop it safely.
3. Proof-of-performance artefacts (main-net or forked-mainnet run) illustrating successful arbitrage trades, liquidations, and price discrepancy captures.
4. A short call or document outlining risk controls, fail-safes, and upgrade paths.

Skills: Node.js, Risk Management, Blockchain, Ethereum, Documentation, Solidity, Smart Contracts, API Integration, Web3.js, Cryptocurrency

We are looking for an experienced Web3/Blockchain Engineer to help us build decentralized applications and smart contracts. You should have hands-on experience with Ethereum or other EVM-compatible chains, Solidity, and Web3 tools.

Must Haves:
Go into the real time data of two main launchpads from both Base and Robinhood
Base Launchpads:
- BNKR launches https://bankr.bot/terminal
- Virtuals (https://app.virtuals.io/)
Robinhood Launchpads:
Pons launchpad https://x.com/ponsdotfamily
Virtual robinhood launchpad (https://app.virtuals.io/)
For these launchpads the bot must be able to:
- Once a coin is launched in these launchpads, the bot do basic scam checks ( such as hidden cluster checks and serial deployer checks), if coin passes the checks then
then bot gives us some basic info such as:
o Name of coin
o Contract Address (CA)
o X Page
o Deployer wallet
o Deployer history (number of previous launches, ETH balance), link to any known wallets on X
- Second thing is for these launchpads, a notification that alerts us whenever a coin in these launchpads get a volume spike.
o For example, if a coin is ‘dead’ and volume is close to zero, usually because of a sudden update, the volume will spike. Will be amazing if we can get an alert within the first 20k volume of these coins. By dead coins, are coins that haven’t moved for a long period of time but still have holders, so potentially at least 50k marketcap plus coins.

Extra point:
potentially would like the bot to be as customisable as possible from a developer point of view, so in the future if we want to manipulate or change things it’s easy to do so on either the front or back end.

We’re looking for an experienced Senior Software Engineers to join a team building and scaling a modern poker platform.

The ideal candidate has strong full-stack experience and is comfortable working across frontend and backend systems, with an interest or background in blockchain and gaming technologies.

- Responsibilities

* Build and maintain scalable frontend and backend applications.
* Develop new features for a consumer-facing gaming platform.
* Design and implement APIs and backend services.
* Work with blockchain/Web3 integrations where required.
* Improve application performance, reliability, and security.
* Collaborate with product, design, blockchain, and engineering teams.
* Participate in technical discussions and contribute to architecture decisions.
* Write clean, maintainable, production-quality code.

- Required Skills

* 5+ years of professional software engineering experience.
* Strong React.js / TypeScript experience.
* Strong backend development experience with Node.js and/or Rust.
* Experience designing and consuming REST/GraphQL APIs.
* Good understanding of databases and distributed systems.
* Experience working with cloud infrastructure.
* Strong Git/GitHub experience.
* Good problem-solving and communication skills.

- Nice to Have

* Solidity / Ethereum / Web3 experience.
* Smart-contract or blockchain integration experience.
* Gaming-platform experience.
* AWS, Docker, Kubernetes, or similar infrastructure experience.
* Experience with high-scale consumer applications.

- Engagement

*Type: Full-time
*Initial duration: 6 months
*Location: Remote
*Availability: Full-time commitment preferred, with some flexibility for exceptional candidates.

- Hiring Process

1. CV/profile review
2. Technical assessment
3. Technical interview
4. Final discussion and onboarding

We’re seeking a backend engineer to build and maintain a scalable web3 backend for a blockchain-based platform. You’ll work on core backend systems, integrate blockchain components, and support ongoing development and maintenance. The ideal candidate has experience building reliable backend services and can help improve performance, security, and scalability. This is a long-term opportunity for someone who can contribute to a growing web3 product.

We’re looking for an experienced Smart Contract Developer to join our Web3 project and help us build and deploy the on-chain components of our product.

We already have a working PoC and are moving toward the MVP stage. You’ll be responsible for reviewing the existing smart contract implementation, improving the architecture where needed, and developing the production-ready contracts and integrations.

Responsibilities:

- Develop and maintain Solidity smart contracts
- Review and improve the existing PoC contracts
- Implement token, reward, staking, vesting, and related on-chain logic
- Integrate smart contracts with backend and frontend systems
- Write unit/integration tests using Hardhat or Foundry
- Deploy and verify contracts on an EVM network
- Optimize gas usage and contract performance
- Implement proper access control and security practices
Identify and fix potential smart contract vulnerabilities
Work closely with the frontend/backend developers

Requirements:

- Strong Solidity and EVM experience
- Solid understanding of Ethereum and EVM-compatible chains
- Hands-on experience with Hardhat or Foundry
- Experience with OpenZeppelin and ERC standards
- Experience integrating contracts with TypeScript/Node.js and Ethers.js
- Strong understanding of smart contract security and testing
- Ability to review an existing codebase and work from an existing PoC
- Experience deploying contracts to testnet/mainnet

Nice to have:

- Web3 game development experience
- Experience with token reward systems or staking
- Experience with EIP-712 and signature-based authorization
Base deployment experience
- Previous startup/MVP development experience

Project: Web3 / EVM / Smart Contracts
Network: Ethereum or Base
Engagement: Part-time or full-time
Start: ASAP

The core of my WebApp is up and running, built across Python, JavaScript, and C++. What remains is a round of meticulous polishing so the whole stack stands up to production-grade demands on mainnet.

Blockchain infrastructure
• Smart contracts need a last review, gas optimisation, and full unit / integration tests before I push them to the governance-enabled dedicated mainnet safe.
• Validator and full-node setup is in place but still requires hardened configuration, monitoring hooks, and automated canary operations so rollouts can be staged safely.
• The app already talks to several internal services; I now need clean, well-documented integration endpoints that survive node restarts and chain re-orgs.

WebApp fine-tuning
• User Interface: tidy up edge-case layouts, improve load times, and resolve two outstanding accessibility issues.
• Backend functionality: streamline database queries, close a handful of race conditions, and align error handling with our logging standards.
• API integration: confirm versioning, tighten rate-limiting, and finish the swagger/OpenAPI spec for external partners.

Acceptance criteria
– All smart-contract tests pass on testnet and mainnet dry-run with zero critical findings.
– Nodes remain healthy through a 24-hour canary cycle without alert fatigue.
– Front-end Lighthouse score ≥ 90 on desktop and mobile.
– Backend latency p95 < 150 ms under projected load.
– API spec published and validated against implemented routes.

You’ll have direct access to the repo (GitHub), CI/CD pipelines (GitHub Actions), governance auditing, and our staging servers. Commits should be granular and reference the provided ticket numbers so I can track progress easily. Once this round is complete, I’ll cut the release candidate and schedule final sign-off.

Skills: Blockchain, Web Development, GitHub, Smart Contracts, Database Management, API Development, API Integration, CI/CD, Accessibility Testing, Security Auditing

We’re seeking a fullstack developer to help build a decentralized fintech application for a growing company. The project includes developing core application features, integrating blockchain functionality, and supporting smart contract development. You’ll work on both front-end and back-end components, collaborate with the team, and help deliver a reliable, scalable product. Experience with decentralized applications and fintech workflows is highly valued. This is a long-term opportunity for someone who can contribute to a complete product build.

Someine that can create or generate FL Coins USDT with software or online tools to send .. Seasoned crypto software developer with deep expertise in blockchain architecture, smart contract development, DeFi protocols, and secure Web3 infrastructure. Skilled in building scalable decentralized applications (dApps), integrating multi-chain solutions, and developing high-performance backend systems using Solidity, Rust, Go, and TypeScript. Strong focus on security, protocol optimization, and delivering production-ready blockchain solutions for startups and enterprise platforms.

Skills: PHP, C Programming, Java, Software Architecture, Blockchain, Ethereum, Solidity, Smart Contracts

I’m kicking off the first phase of a brand-new real-estate rental platform and need an experienced full-stack engineer who enjoys shaping products from day one.
Our immediate priority is the user onboarding and application flow: secure email-and-password registration, profile creation, document upload, and a smooth path for tenants to submit rental applications. Once that foundation is solid, we’ll expand into listings, search, and end-to-end rental management.

You’ll be pairing React, Next.js, and TypeScript on the front end with a Node.js REST API on the back. I’m looking for someone who can help define the architecture, choose the right tooling, write production-ready code, and keep scalability in mind from the outset. If you have thoughts on introducing Web3 or blockchain elements later, that curiosity is a plus.

Deliverables for this first milestone
• A modular authentication & onboarding system (email + password, forgot/reset, verification)
• Tenant application workflow (form steps, file uploads, status tracking)
• Clean, documented API endpoints powering the flows above
• Well-structured React/Next.js pages and reusable components
• Basic test coverage and deployment scripts so we can iterate confidently

There’s no hard deadline, so quality and thoughtful design trump speed. If collaborating on green-field product decisions excites you, let’s talk and start mapping out the roadmap together.

Skills: PHP, HTML, Node.js, AngularJS, Blockchain, Full Stack Development, Next.js, REST API

We are looking for an experienced Senior Blockchain Engineer to help design, develop, and maintain secure, scalable, and production-ready blockchain solutions.
The ideal freelancer has strong experience with blockchain protocols, smart contracts, Web3 applications, decentralized systems, and blockchain infrastructure. You should be comfortable working across the blockchain stack, from smart-contract development and testing to backend integration and production deployment.
We are looking for an engineer who can make sound technical decisions, identify security and scalability risks, and contribute to the overall architecture of the platform.

1. What You'll Do
- Design, develop, and maintain production-grade blockchain applications
- Design and implement secure smart contracts
- Develop and integrate blockchain-based services and APIs
- Build Web3 applications and decentralized application (dApp) functionality
- Integrate blockchain networks with backend and frontend systems
- Design blockchain architecture and technical solutions for new features
- Work with wallets, transactions, tokens, and blockchain data
- Implement blockchain indexing and event-processing solutions
- Optimize smart contracts and blockchain interactions for performance and gas efficiency
- Develop automated tests for smart contracts and blockchain services
- Conduct code reviews and identify security and reliability risks
- Investigate and troubleshoot blockchain transactions and production issues
- Work with product, frontend, backend, and infrastructure engineers
- Participate in technical architecture discussions and proof-of-concept development
- Document technical designs, APIs, smart contracts, and development processes
- Mentor other engineers when appropriate

2. Required Skills

2.1 Blockchain & Web3

- Strong understanding of blockchain architecture
- Practical experience with Ethereum or EVM-compatible networks
- Strong understanding of transactions, blocks, gas, wallets, and cryptographic concepts
- Web3 application development
- Experience interacting with blockchain nodes and RPC providers
- Experience with blockchain explorers and on-chain data
- Understanding of decentralized applications and blockchain infrastructure

2.2 Smart Contracts

- Strong Solidity experience
- Smart-contract architecture and development
- ERC-20 / ERC-721 / ERC-1155 standards
- Contract deployment and upgrade strategies
- Contract testing and debugging
- Gas optimization
- Event design and event processing
- Understanding of common smart-contract vulnerabilities

Experience with OpenZeppelin and established smart-contract development practices is strongly preferred.

2.3 Blockchain Development Tools

Experience with tools and frameworks such as:

- Hardhat
- Foundry
- ethers.js
- viem
- Web3.js
- OpenZeppelin
- Wallet integrations
- Blockchain RPC providers

Experience with other modern blockchain development frameworks is also welcome.

2.4 Backend & API Integration

- Node.js / TypeScript
- REST and/or GraphQL APIs
- Event-driven architectures
- Blockchain indexing
- PostgreSQL or other relational databases
- Redis or similar caching technologies
- Experience building backend services that interact with smart contracts

2.5 Testing & Security

- Unit testing
- Integration testing
- Smart-contract testing
- End-to-end testing
- Testnet deployment and validation
- Security-focused development practices
- Understanding of reentrancy, access-control, oracle, signature, and transaction-manipulation risks
- Experience reviewing smart contracts for security vulnerabilities

Experience working with professional blockchain security/audit processes is a strong plus.

2.6 Infrastructure & DevOps

- GitHub Actions / CI/CD
- Cloud infrastructure such as AWS, GCP, or Azure
- Blockchain node infrastructure
- Monitoring and logging
- Production deployment and incident troubleshooting

3. Blockchain Networks

Strong experience with at least one of the following is required:

- Ethereum
- Polygon
- Arbitrum
- Optimism
- Base
- BNB Chain
- Avalanche

Experience with multiple EVM-compatible networks is a strong advantage.

Experience with non-EVM blockchain ecosystems such as Solana or others is also welcome.

4. Requirements

- 5+ years of professional software engineering experience
- 3+ years of practical blockchain/Web3 development experience
- Strong Solidity experience
- Strong understanding of EVM architecture
- Experience building production blockchain applications
- Strong understanding of smart-contract security
- Experience with blockchain testing and deployment
- Strong backend development skills
- Strong problem-solving and debugging skills
- Excellent communication skills
- Ability to work independently and collaborate with other engineers
- Ability to design scalable and maintainable technical solutions
- Ability to write clean, well-tested, production-quality code

5. Project Expectations

We are looking for someone who can contribute at a senior engineering level, not simply implement isolated smart-contract tasks.

You should be comfortable taking a blockchain feature through the complete development lifecycle:

Requirements → Architecture → Smart Contract Design → Implementation → Testing → Security Review → Deployment → Monitoring → Production Support

We value engineers who can identify technical and security risks proactively and recommend better approaches before problems reach production.
Security, reliability, scalability, and maintainability are critical requirements for this project.

6. Engagement

Experience level: Expert
Project type: Long-term / ongoing
Work: Remote
Hours: Flexible, with some overlap with U.S. Eastern Time preferred
Potential: Long-term collaboration for the right freelancer

7. To Apply

Please include:

- A brief introduction about your blockchain engineering experience
- Years of professional blockchain/Web3 experience
- Years of professional Solidity experience
- Blockchain networks you have worked with
- Examples of production blockchain projects you have built
- Links to relevant GitHub repositories, contracts, dApps, or portfolio projects
- Your experience with Hardhat and/or Foundry
- Your experience with OpenZeppelin
- Your smart-contract security experience
- Your experience with blockchain indexing and event processing
- Your preferred hourly rate
- Your availability and typical weekly capacity
- Technical Question

8. Hiring Process

Step 1 — Proposal Review
We will review your proposal, relevant blockchain experience, portfolio, GitHub repositories, and technical background.

Step 2 — Technical Assessment
Shortlisted candidates will complete a technical assessment covering blockchain architecture, Solidity, smart-contract security, Web3 integration, testing, gas optimization, and system design.

Step 3 — Technical Interview
A 30–45 minute conversation to discuss your blockchain experience, previous projects, architectural decisions, security practices, problem-solving approach, availability, and communication style.

Step 4 — Final Interview
A brief conversation with the project/hiring manager to discuss expectations, collaboration, schedule, and long-term goals.

Step 5 — Offer & Upwork Contract
The selected freelancer will receive an official Upwork offer and contract. Once the contract is accepted, we will agree on the start date, working hours, milestones, and project priorities.

9. Estimated Timeline

We aim to complete the hiring process within 1–2 weeks, depending on candidate availability.
We value a respectful, transparent process and will keep candidates informed throughout each stage.

Job Description

We are looking for an experienced Full-Stack Web3 Developer to develop a blockchain-powered academic and community library platform called Coinstar.

The platform combines a traditional digital library with BOOKZ token rewards, escrow-based book lending, ERC-4337 smart accounts, and gasless transactions on Polygon.

Key Responsibilities

- Develop the Student Portal and media catalog
- Implement book search, filtering, reservations, and loan management
- Integrate BOOKZ token functionality
- Develop and integrate escrow smart contracts
- Implement ERC-4337 smart accounts and paymaster/gasless transactions
- Build token rewards and transaction history
- Connect frontend, backend, database, and blockchain layers
- Implement secure authentication and role-based access
- Optimize the platform for production security and scalability

Required Skills

- Solidity / Smart Contract Development
- React / Next.js
- TypeScript / JavaScript
- Node.js / API development
- PostgreSQL or similar database
- Polygon / EVM
- ERC-4337 / Account Abstraction
- Web3 wallet integration
- Blockchain security

Experience with DeFi, tokenized platforms, escrow systems, or Web3 marketplaces is a strong advantage.

Project Goal

Build a production-ready Web3 library platform where users can reserve books with BOOKZ escrow, manage loans, return books, release escrow, and earn reading rewards.

Hi, we have a dating and gaming app and are looking for a professional to upgrade our games—making them look better and creating a great user experience. If it’s a good fit, they could stay on with us long-term as the person in charge of games.

We are building an open-source SaaS marketplace focused on Japanese SaaS products and services, featuring 500+ SaaS solutions.

The platform will help businesses easily discover, search, filter, compare, and evaluate Japanese SaaS products across categories such as AI, CRM, Finance, HR, Marketing, Security, Productivity, and more.

Key Features
- 500+ SaaS product listings
- Search and advanced filtering
- SaaS categories and product profiles
- Product comparison
- Pricing and feature information
- Product submission and moderation
- Responsive, modern UI/UX
- SEO-friendly pages
- Japanese and English support

We are looking for an experienced developer who can build a scalable, modern marketplace platform and contribute to an open-source codebase.

Preferred: Blockchain, Hardhat, Web3, React/Next.js, TypeScript, Node.js, PostgreSQL, REST APIs, SEO, and marketplace/SaaS experience.

Please include relevant previous projects, GitHub, availability, and estimated timeline when applying.

We are looking for an experienced High-Ticket Closer to join our sales team for an upcoming Web3/crypto project.

This is a commission-only position, ideal for someone who is confident on sales calls, understands how to build trust with prospects, and can close high-value deals.

About the Project

We are working with BPLAY, a Web3 project built on Polygon, currently preparing for its upcoming token launch.

The project is currently in the pre-sale stage, and we are looking for closers who can speak with qualified prospects, explain the opportunity clearly, handle objections, and convert interested prospects into buyers/investors.

You don’t need to be a blockchain expert. We will provide the necessary information, offer structure, and sales materials.

Your Responsibilities

* Conduct sales calls with qualified/warm prospects
* Understand the prospect’s goals and level of interest
* Present the BPLAY project and the pre-sale opportunity
* Handle questions and objections professionally
* Follow up with interested prospects
* Close deals and maintain accurate CRM notes
* Build trust and create a professional buying experience

Compensation

20% commission on every closed deal.

There is no fixed salary — this is a commission-only opportunity.

The earning potential is therefore directly connected to your performance and the volume/value of deals you close.

Who We’re Looking For

We are looking for someone who:

* Has proven experience as a closer
* Is comfortable selling high-ticket offers
* Has excellent English communication skills
* Is confident handling objections
* Can build rapport quickly with prospects
* Is self-motivated and comfortable working on commission
* Has previous experience in crypto, Web3, investments, SaaS, high-ticket sales, or similar industries — preferred, but not mandatory

What We Provide

* Sales training and product information
* Sales scripts and materials
* Qualified prospects/leads
* CRM and sales process
* Support from the team
* 20% commission per closed deal

If you’re an experienced closer who is comfortable with a performance-based compensation model and you’re interested in joining a Web3 project at the pre-sale stage, we’d like to hear from you.

To apply, please send:

1. A short introduction
2. Your previous closing experience
3. What industries/products you have sold
4. Your average deal size
5. Your typical closing rate
6. Your availability
7. A short description of your experience with crypto/Web3, if any

Job Description
I am looking for an experienced blockchain developer to assist with the technical setup, testing, security review, and launch of two legitimate community-focused meme coin projects.

I have experience in web development, WordPress, SEO, branding, and digital marketing, but this will be my first time launching cryptocurrency projects. I will be handling the websites, branding, marketing, community development, and much of the overall project management. I am looking for an experienced blockchain developer to handle or advise on the blockchain-specific portions of the projects.

The two projects are currently planned for:

Project 1 — Solana
The token is expected to launch using established Solana infrastructure such as Raydium LaunchLab or another appropriate launch method.

The basic token launch itself should be relatively straightforward, but this project will eventually include a more sophisticated holder rewards system.

We are interested in developing an epoch-based rewards engine that can evaluate token holders based on predetermined qualification criteria. For example, eligibility may depend on maintaining a minimum token balance for a minimum period of time before becoming eligible for rewards.

Our preferred architecture would keep this rewards system separate from the core token whenever practical rather than adding unnecessary complexity to the token contract itself.

Rewards should eventually be capable of being automatically distributed directly to qualifying wallets without requiring holders to manually claim them.

Project 2 — Robinhood Chain
This project is planned for Robinhood Chain and we are currently considering Pons or similar Robinhood Chain launch infrastructure.

The project will have a strong emphasis on liquidity. We are considering a system in which project/creator revenue is automatically divided according to predefined rules, with the majority directed toward liquidity and the remainder directed toward project development.

We would like the developer to help determine the safest and simplest architecture for implementing this while keeping the process transparent and verifiable on-chain where reasonably possible.

Scope of Work
The selected developer may assist with:

Reviewing and recommending the appropriate launch architecture for both projects
Solana SPL / Token-2022 token deployment and configuration
Raydium / Solana liquidity and launch infrastructure
Robinhood Chain / EVM smart-contract and launch infrastructure
Pons and/or Uniswap liquidity integrations where appropriate
Founder/team token vesting
Treasury architecture
LP locking or permanent liquidity solutions
Multisig wallet setup
Creating the Solana holder rewards/indexing system
Tracking wallet balances over defined reward epochs
Calculating holder eligibility based on configurable criteria
Automated reward distributions to qualifying wallets
Building safeguards around the reward-distribution wallet
Automated allocation of project revenue between liquidity and development wallets if technically appropriate
Devnet/testnet deployment and testing before mainnet launch
Mainnet deployment assistance
Smart-contract/script security review
Clear documentation of all code and infrastructure
Source code delivered to us through a private GitHub repository
Post-launch technical support during the initial launch period
SECURITY / WALLET REQUIREMENTS
This is extremely important.

The developer will NOT receive our seed phrases or private keys.

We intend to maintain complete custody of founder wallets, treasury wallets, and project assets.

The architecture should be designed so that the developer can build and test the system using public wallet addresses, test wallets, development wallets, and/or limited-purpose deployment wallets.

Important mainnet transactions should be capable of being reviewed and signed by us.

Any automated wallet required for rewards or other functions should contain only the minimum assets necessary to perform that function and should not have unrestricted access to the primary project treasury.

We are also interested in using a reputable multisig structure for treasury assets.

A developer who requires our seed phrase or unrestricted access to project wallets will not be considered.

Ideal Candidate
We are looking for someone who has real production experience with Solana and EVM development, not simply someone who has used token-generator websites.

Experience with Solana RPC/indexing, SPL tokens, Token-2022, Raydium, Meteora, wallet snapshots, automated token distributions, multisig systems, Solidity/EVM development, Uniswap liquidity, and Arbitrum-compatible chains would be particularly useful.

Experience building token holder reward systems is a major plus.

The ideal developer will also be comfortable explaining technical decisions to someone who understands web development but is relatively new to blockchain development.

When Applying
Please include:

Examples of tokens, smart contracts, reward systems, or blockchain projects you have personally developed.
Your GitHub profile or examples of source code if available.
Your experience specifically with Solana development.
Your experience with Solidity/EVM chains.
Whether you have worked with Raydium, Meteora, Jupiter, Pons, Uniswap, or similar launch/liquidity systems.
Whether you have built an automated token-holder rewards or wallet-snapshot system before.
How you would approach an epoch-based system that requires a wallet to maintain a minimum token balance for a defined period before receiving rewards.
How you would architect automated reward distributions without exposing the primary treasury wallet.
How you normally handle deployment when the client retains custody of all private keys.
Your preferred pricing structure and estimated availability over the next several weeks.
Please start your proposal with the words “NON-CUSTODIAL” so I know you have read the wallet/security requirements.

We are not looking to rush a token out in a day. We are interested in building these projects correctly, testing the infrastructure, protecting the treasury, and creating a system that can continue operating after launch.

There is potential for ongoing paid development work if the initial projects go well.

I have three blockchain directory websites with existing logos. Each site has a different primary color (image attached) I want to develop 4 supporting colors for each brand, for a total of 5 colors that work together well. These will be used for website accents, social media assets, displaying graphs, etc.

The second part of the job is, using colors from the brand palette, I’d like a set of 20 (for each chain, so 60 total) high quality “grainy gradient” images that use the color scheme of each site.

Each gradient should use two to four colors from its brand palette, optionally combined with shared neutrals. Please vary the compositions while keeping the family recognizable. I'll use these for blog post images so they should look nice together.

You can use whatever tools you want to make the grainy gradients, but I would like to get any source files and know the process you used. Provide source files for every gradient please.

If applying, please provide an example of a grainy gradient you made.

So the final deliverables are:
- 12 new colors (4 for each brand)
- 60 grainy gradient images (20 for each brand)

One of the three sites is live at https://www.adastack.io. We have a design system documented here: https://www.adastack.io/design-system-x9k2.

About Us

Chainlabs is a Web3 data analytics and software boutique specializing in blockchain intelligence. Our mission is to enhance Web3 analytics, combat illicit activities, and foster transparency in the crypto ecosystem. We work with AML service providers, analytics firms, and law enforcement globally.

Role Overview

We’re hiring a Turkey-based Regional Web3 Researcher (part-time) to expand our understanding of Turkeys's crypto ecosystem.

Ideal for students or professionals passionate about blockchain/Web3 who want impact, flexibility, and hands-on research experience. This role can qualify as an internship for academic credit (school approval required).

Why Join Us

- Contribute to meaningful work that improves blockchain transparency and fights illicit activity.
- Build skills across regional market research, fintech analysis, and blockchain fundamentals.
- Learn from an experienced Web3 investigations team and grow in a high-trust, remote environment.

Key Responsibilities

- Ecosystem Mapping (Turkey): Track exchanges, OTC/P2P venues, social communities, payment rails (e.g., Interac e-Transfer/EFT), and growth trends.
- Regulatory Awareness: Summarize public developments relevant to Turkey.
- Market Intelligence: Identify key influencers, forums, and local narratives; capture regional adoption drivers and risks.
- Source Building (OSINT): Collect and structure open-source data (Sheets) with clear citations and simple quality notes.
- Reporting: Produce short, action-oriented summaries and datasets that the tracing team can use immediately.

Requirements

- Strong interest in blockchain and Web3 technologies - Knowledge of regional cryptocurrency trends and marketing strategies.
- Proficiency in using research tools and Google Sheets.
- Excellent written and verbal communication skills in English, as well as Turkish.
- Ability to work independently and meet deadlines.
- Students currently enrolled in university programs are encouraged to apply.
- Nice to have: familiarity with FINTRAC/CSA public materials, Interac/EFT rails, and crypto exchange mechanics.

What We Offer

- Flexible remote work (10–20 hrs/week, project-driven).
- Hourly compensation based on experience and output.
- Mentorship, training materials, and exposure to real Web3 investigations.
- Opportunity to grow into broader tracing/research responsibilities.

Security & Compliance (lightweight)

- Follow Chainlabs’ security practices (2FA, VPN, secure handling of sources).
- Complete a brief identity verification before access to internal systems.
- Respect privacy and data-minimization guidelines when collecting/storing information.

About Us

Chainlabs is a Web3 data analytics and software boutique specializing in blockchain intelligence. Our mission is to enhance Web3 analytics, combat illicit activities, and foster transparency in the crypto ecosystem. We work with AML service providers, analytics firms, and law enforcement globally.

Role Overview

We’re hiring a Germany-based Regional Web3 Researcher (part-time) to expand our understanding of Belarus's crypto ecosystem.

Ideal for students or professionals passionate about blockchain/Web3 who want impact, flexibility, and hands-on research experience. This role can qualify as an internship for academic credit (school approval required).

Why Join Us

- Contribute to meaningful work that improves blockchain transparency and fights illicit activity.
- Build skills across regional market research, fintech analysis, and blockchain fundamentals.
- Learn from an experienced Web3 investigations team and grow in a high-trust, remote environment.

Key Responsibilities

- Ecosystem Mapping (Germany): Track exchanges, OTC/P2P venues, social communities, payment rails (e.g., Interac e-Transfer/EFT), and growth trends.
- Regulatory Awareness: Summarize public developments relevant to Germany.
- Market Intelligence: Identify key influencers, forums, and local narratives; capture regional adoption drivers and risks.
- Source Building (OSINT): Collect and structure open-source data (Sheets) with clear citations and simple quality notes.
- Reporting: Produce short, action-oriented summaries and datasets that the tracing team can use immediately.

Requirements

- Strong interest in blockchain and Web3 technologies - Knowledge of regional cryptocurrency trends and marketing strategies.
- Proficiency in using research tools and Google Sheets.
- Excellent written and verbal communication skills in English, as well as German.
- Ability to work independently and meet deadlines.
- Students currently enrolled in university programs are encouraged to apply.
- Nice to have: familiarity with FINTRAC/CSA public materials, Interac/EFT rails, and crypto exchange mechanics.

What We Offer

- Flexible remote work (10–20 hrs/week, project-driven).
- Hourly compensation based on experience and output.
- Mentorship, training materials, and exposure to real Web3 investigations.
- Opportunity to grow into broader tracing/research responsibilities.

Security & Compliance (lightweight)

- Follow Chainlabs’ security practices (2FA, VPN, secure handling of sources).
- Complete a brief identity verification before access to internal systems.
- Respect privacy and data-minimization guidelines when collecting/storing information.

About Us

Chainlabs is a Web3 data analytics and software boutique specializing in blockchain intelligence. Our mission is to enhance Web3 analytics, combat illicit activities, and foster transparency in the crypto ecosystem. We work with AML service providers, analytics firms, and law enforcement globally.

Role Overview

We’re hiring a Germany-based Regional Web3 Researcher (part-time) to expand our understanding of Belarus's crypto ecosystem.

Ideal for students or professionals passionate about blockchain/Web3 who want impact, flexibility, and hands-on research experience. This role can qualify as an internship for academic credit (school approval required).

Why Join Us

- Contribute to meaningful work that improves blockchain transparency and fights illicit activity.
- Build skills across regional market research, fintech analysis, and blockchain fundamentals.
- Learn from an experienced Web3 investigations team and grow in a high-trust, remote environment.

Key Responsibilities

- Ecosystem Mapping (Germany): Track exchanges, OTC/P2P venues, social communities, payment rails (e.g., Interac e-Transfer/EFT), and growth trends.
- Regulatory Awareness: Summarize public developments relevant to Germany.
- Market Intelligence: Identify key influencers, forums, and local narratives; capture regional adoption drivers and risks.
- Source Building (OSINT): Collect and structure open-source data (Sheets) with clear citations and simple quality notes.
- Reporting: Produce short, action-oriented summaries and datasets that the tracing team can use immediately.

Requirements

- Strong interest in blockchain and Web3 technologies - Knowledge of regional cryptocurrency trends and marketing strategies.
- Proficiency in using research tools and Google Sheets.
- Excellent written and verbal communication skills in English, as well as German.
- Ability to work independently and meet deadlines.
- Students currently enrolled in university programs are encouraged to apply.
- Nice to have: familiarity with FINTRAC/CSA public materials, Interac/EFT rails, and crypto exchange mechanics.

What We Offer

- Flexible remote work (10–20 hrs/week, project-driven).
- Hourly compensation based on experience and output.
- Mentorship, training materials, and exposure to real Web3 investigations.
- Opportunity to grow into broader tracing/research responsibilities.

Security & Compliance (lightweight)

- Follow Chainlabs’ security practices (2FA, VPN, secure handling of sources).
- Complete a brief identity verification before access to internal systems.
- Respect privacy and data-minimization guidelines when collecting/storing information.

About Us

Chainlabs is a Web3 data analytics and software boutique specializing in blockchain intelligence. Our mission is to enhance Web3 analytics, combat illicit activities, and foster transparency in the crypto ecosystem. We work with AML service providers, analytics firms, and law enforcement globally.

Role Overview

We’re hiring a citizen from Hong Kong for our Regional Web3 Data Specialist (part-time) to expand our understanding of Hong Kong's crypto ecosystem.

Ideal for students or professionals passionate about blockchain/Web3 who want impact, flexibility, and hands-on research experience. This role can qualify as an internship for academic credit (school approval required).

Why Join Us

- Contribute to meaningful work that improves blockchain transparency and fights illicit activity.
- Build skills across regional market research, fintech analysis, and blockchain fundamentals.
- Learn from an experienced Web3 investigations team and grow in a high-trust, remote environment.

Key Responsibilities

- Ecosystem Mapping (Hong Kong): Track exchanges, OTC/P2P venues, social communities, payment rails (e.g., Interac e-Transfer/EFT), and growth trends.
- Regulatory Awareness: Summarize public developments relevant to Hong Kong.
- Market Intelligence: Identify key influencers, forums, and local narratives; capture regional adoption drivers and risks.
- Source Building (OSINT): Collect and structure open-source data (Sheets) with clear citations and simple quality notes.
- Reporting: Produce short, action-oriented summaries and datasets that the tracing team can use immediately.

Requirements

- Strong interest in blockchain and Web3 technologies - Knowledge of regional cryptocurrency trends and marketing strategies.
- Proficiency in using research tools and Google Sheets.
- Excellent written and verbal communication skills in English and Cantonese.
- Ability to work independently and meet deadlines.
- Students currently enrolled in university programs are encouraged to apply.
- Nice to have: familiarity with FINTRAC/CSA public materials, Interac/EFT rails, and crypto exchange mechanics.

What We Offer

- Flexible remote work (10–20 hrs/week, project-driven).
- Hourly compensation based on experience and output.
- Mentorship, training materials, and exposure to real Web3 investigations.
- Opportunity to grow into broader tracing/research responsibilities.

Security & Compliance (lightweight)

- Follow Chainlabs’ security practices (2FA, VPN, secure handling of sources).
- Complete a brief identity verification before access to internal systems.
- Respect privacy and data-minimization guidelines when collecting/storing information

About Us

Chainlabs is a Web3 data analytics and software boutique specializing in blockchain intelligence. Our mission is to enhance Web3 analytics, combat illicit activities, and foster transparency in the crypto ecosystem. We work with AML service providers, analytics firms, and law enforcement globally.

Role Overview

We’re hiring a Japan-based Regional Web3 Researcher (part-time) to expand our understanding of Japan's crypto ecosystem.

Ideal for students or professionals passionate about blockchain/Web3 who want impact, flexibility, and hands-on research experience. This role can qualify as an internship for academic credit (school approval required).

Why Join Us

- Contribute to meaningful work that improves blockchain transparency and fights illicit activity.
- Build skills across regional market research, fintech analysis, and blockchain fundamentals.
- Learn from an experienced Web3 investigations team and grow in a high-trust, remote environment.

Key Responsibilities

- Ecosystem Mapping (Japan): Track exchanges, OTC/P2P venues, social communities, payment rails (e.g., Interac e-Transfer/EFT), and growth trends.
- Regulatory Awareness: Summarize public developments relevant to Japan.
- Market Intelligence: Identify key influencers, forums, and local narratives; capture regional adoption drivers and risks.
- Source Building (OSINT): Collect and structure open-source data (Sheets) with clear citations and simple quality notes.
- Reporting: Produce short, action-oriented summaries and datasets that the tracing team can use immediately.

Requirements

- Strong interest in blockchain and Web3 technologies - Knowledge of regional cryptocurrency trends and marketing strategies.
- Proficiency in using research tools and Google Sheets.
- Excellent written and verbal communication skills in English and Japanese.
- Ability to work independently and meet deadlines.
- Students currently enrolled in university programs are encouraged to apply.
- Nice to have: familiarity with FINTRAC/CSA public materials, Interac/EFT rails, and crypto exchange mechanics.

What We Offer

- Flexible remote work (10–20 hrs/week, project-driven).
- Hourly compensation based on experience and output.
- Mentorship, training materials, and exposure to real Web3 investigations.
- Opportunity to grow into broader tracing/research responsibilities.

Security & Compliance (lightweight)

- Follow Chainlabs’ security practices (2FA, VPN, secure handling of sources).
- Complete a brief identity verification before access to internal systems.
- Respect privacy and data-minimization guidelines when collecting/storing information.

About Us

Chainlabs is a Web3 data analytics and software boutique specializing in blockchain intelligence. Our mission is to enhance Web3 analytics, combat illicit activities, and foster transparency in the crypto ecosystem. We work with AML service providers, analytics firms, and law enforcement globally.

Role Overview

We’re hiring a Kyrgyzstan-based Regional Web3 Researcher (part-time) to expand our understanding of Kyrgyzstan's crypto ecosystem.

Ideal for students or professionals passionate about blockchain/Web3 who want impact, flexibility, and hands-on research experience. This role can qualify as an internship for academic credit (school approval required).

Why Join Us

- Contribute to meaningful work that improves blockchain transparency and fights illicit activity.
- Build skills across regional market research, fintech analysis, and blockchain fundamentals.
- Learn from an experienced Web3 investigations team and grow in a high-trust, remote environment.

Key Responsibilities

- Ecosystem Mapping (Kyrgyzstan): Track exchanges, OTC/P2P venues, social communities, payment rails (e.g., Interac e-Transfer/EFT), and growth trends.
- Regulatory Awareness: Summarize public developments relevant to Kyrgyzstan.
- Market Intelligence: Identify key influencers, forums, and local narratives; capture regional adoption drivers and risks.
- Source Building (OSINT): Collect and structure open-source data (Sheets) with clear citations and simple quality notes.
- Reporting: Produce short, action-oriented summaries and datasets that the tracing team can use immediately.

Requirements

- Strong interest in blockchain and Web3 technologies - Knowledge of regional cryptocurrency trends and marketing strategies.
- Proficiency in using research tools and Google Sheets.
- Excellent written and verbal communication skills in English, Kyrgyz and if possible, Russian as well.
- Ability to work independently and meet deadlines.
- Students currently enrolled in university programs are encouraged to apply.
- Nice to have: familiarity with FINTRAC/CSA public materials, Interac/EFT rails, and crypto exchange mechanics.

What We Offer

- Flexible remote work (10–20 hrs/week, project-driven).
- Hourly compensation based on experience and output.
- Mentorship, training materials, and exposure to real Web3 investigations.
- Opportunity to grow into broader tracing/research responsibilities.

Security & Compliance (lightweight)

- Follow Chainlabs’ security practices (2FA, VPN, secure handling of sources).
- Complete a brief identity verification before access to internal systems.
- Respect privacy and data-minimization guidelines when collecting/storing information.

I’m looking for an experienced Unity developer to help complete the first playable demo of a multiplayer boat survival game currently in development.

The project has already been started in Unity and I will continue working on it while I search for the right developer. I am not looking for someone to start an entirely new project from scratch. I need someone who can review what has already been built, work from the existing project, troubleshoot where necessary, and efficiently complete what is still needed for the demo.

The core concept involves players navigating boats through increasingly dangerous storm conditions while dealing with environmental hazards and obstacles. For the first demo, the priority is creating a functional and believable gameplay experience with a controllable boat, convincing ocean movement and buoyancy, stormy weather and atmosphere, hazards or obstacles, and the core gameplay necessary to demonstrate the concept.

This first contract is specifically for the playable demo. It does not include blockchain or NFT integration. That portion of the project is being handled separately.

I am looking for someone who is very comfortable with Unity and C#, particularly someone with experience in water or ocean environments, boat physics and buoyancy, weather systems, gameplay mechanics, optimization, and troubleshooting existing Unity projects. Multiplayer experience is also highly preferred because the larger game is being designed as a multiplayer experience.

The fixed budget for this first demo milestone is $500 and the budget is firm. Please only apply if you are comfortable completing the agreed demo scope within this budget. Additional development may be offered as separate paid milestones if we work well together.

I am looking to move quickly. When applying, please include examples of Unity games or playable projects you have personally worked on, especially anything involving boats, water, physics, weather, survival gameplay, or multiplayer. Please also briefly explain what part of those projects you personally handled.

Good communication and the ability to work efficiently within an existing project are important.

Full-Stack Developer Needed - Crypto Mining Simulator Mobile App

We are looking for an experienced Full-Stack Mobile App Developer to build a modern and polished Crypto Mining Simulator mobile application.

Important:

This is NOT a Web3, Blockchain, Smart Contract, or actual crypto-mining project. No CPU/GPU/device mining is involved. The mining experience is simulated through a controlled reward/session system.

Main Requirements:
3 major main sections: Home, Rewards, Account
Few supporting subpages/information pages
User registration/login & profile
Simulated mining/session & reward system
Referral/invite & referral rewards
Google AdMob integration (including rewarded ads)
Withdrawal request & history
Backend/API + database
Admin panel
Notifications
Basic security/anti-abuse
Modern, attractive and polished UI/UX
Android app development
Deployment & Launch

Experience with Hostinger VPS (Ubuntu/Linux) is required, including backend deployment, database setup, Nginx, SSL/HTTPS and production configuration.

Strongly preferred: Developers who have experience taking an application end-to-end through Google Play Store launch, including production build, Play Console setup/submission, testing and release.

Preferred Experience:

Developers who have previously built crypto mining simulator, reward, referral, ad-based, or similar applications are strongly preferred.

If you have a live app or previous project of a similar type, please share it.

Please Include:
Portfolio / previous work
Similar app experience
Technology stack
Hostinger VPS / Ubuntu experience
Google AdMob experience
Google Play Store launch experience
Estimated timeline
Fixed project quotation

Looking for someone who can handle the project end-to-end: Mobile App + Backend + Database + Admin + VPS Deployment + Play Store Launch.

Skills: PHP, Linux, Mobile App Development, Android, VPS, UI / User Interface, Full Stack Development, Backend Development, Database Management, API Development

We are building a financial tracking platform that processes 100K+ financial and crypto transactions per day, analyzes transaction activity, and triggers user-specific events and notifications in near real time.

We are looking for a senior FinTech engineer to help with an existing production codebase. The immediate task is to review a PR, identify the root cause of a bug, and implement or validate the fix.

What You'll Do
* Review an existing PR and related code.
* Debug and fix transaction-processing issues.
* Validate financial and crypto transaction logic.
* Check for concurrency, duplicate processing, and data consistency issues.
* Improve tests and confirm the fix is production-ready.

Tech Stack
* Python, FastAPI
* Vue.js, TypeScript
* SQL, Apache Iceberg
* OpenAI API, MCP
* Financial and crypto transaction data
* GitHub, CI/CD, automated PR review
* AI-assisted development workflows

What We're Looking For
Strong experience with Python, FastAPI, SQL, and production debugging is required.

Experience with FinTech, crypto, blockchain data, transaction processing, trading, portfolio tracking, or other high-volume financial systems is strongly preferred.

You should understand concepts such as idempotency, transaction reconciliation, event-driven processing, concurrency, financial precision, and data integrity.

To Apply
Please briefly describe your experience with:
* FinTech or crypto transaction systems
* Python / FastAPI
* High-volume transaction or data processing
* Debugging complex production issues

Please include one example of a difficult bug you diagnosed and fixed.

This is an initial PR review and bug-fix task, with potential for ongoing work if there is a strong fit.