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I launched a new SHA-256 coin two months ago (see sha256coin.eu) and now need a production-ready mining pool that can comfortably handle ASIC hash rates.
Both user interfaces are required.
• Web: must show real-time hashrate and worker stats, let miners create and manage their own accounts, and run an automated payout engine with threshold and fee controls.
• Command-line: Linux-only, able to add/remove nodes, tweak pool fees, trigger manual payouts, and query live status; it should compile cleanly on a recent Ubuntu/Debian box.
Stratum support (V1 or V2), vardiff, JSON-RPC access, and a small REST API for future integrations would be ideal, provided everything stays fully compatible with common ASIC firmware such as Antminer and WhatsMiner.
Deliverables
1. Fully operational pool deployed on my VPS (root access supplied).
2. Source code and build scripts in a private Git repo.
3. Clear installation guide so I can redeploy from scratch.
4. One-hour hand-over session plus a live test: at least two ASIC miners connect via stratum+tcp, appear on the dashboard within seconds, and receive an automatic payout once the threshold triggers.
If you have past experience with node-open-mining-portal, Yiimp, or a comparable framework, mention it along with your estimated timeline—re-using solid open-source is perfectly fine as long as the above criteria are met.
Skills: PHP, Python, Linux, Software Architecture, C++ Programming, VPS, Blockchain, API Development, Cryptocurrency
Fixed budget:
12,500 - 37,500 INR
1 hour ago
Websites, IT & Software, Design, Media & Architecture, Python, Linux, Software Architecture, C++ Programming, VPS, Blockchain, API Development, Cryptocurrency
I’m looking for an experienced backend engineer to help build a real-time prediction market arbitrage bot that monitors and executes trades across Kalshi and Polymarket.
The bot will:
• Ingest live market data via REST & WebSocket APIs
• Match equivalent events across platforms (e.g., elections, finance, crypto)
• Detect arbitrage opportunities after fees and slippage
• Execute trades safely using limit orders and risk controls
• Provide monitoring, logging, and alerting
This is a serious, production-grade project, not a simple bot. Experience with trading systems, order books, low-latency data processing, and risk management is required.
We are seeking a proficient Blockchain Developer with expertise in Ethereum, Solidity, and Next.js to architect and implement a decentralized application (dApp). The ideal candidate will possess a strong background in developing and deploying smart contracts, demonstrating knowledge of gas optimization and security protocols. Proficiency in frontend development using Next.js and TypeScript, along with UI styling via Tailwind CSS, is essential. The candidate will integrate MetaMask for wallet authentication and facilitate seamless on-chain interactions. Previous experience with ERC standards and production dApps is preferred. This is a remote, one-time project with potential for ongoing collaboration.
We’re looking for a crypto-native developer to help us build and ship fast-moving projects in the Solana ecosystem.
You should be deeply comfortable writing and auditing Solana smart contracts, building end-to-end crypto products, and operating in extremely tight timelines (ideation → shipped prototype in a day when needed). This role favors builders who actively use AI tools to accelerate development and are used to working in high-iteration environments.
We are looking for an experienced Web3 & Crypto Marketing Expert to help grow and promote our blockchain-based project. The ideal candidate has a deep understanding of the crypto ecosystem and a proven track record of building visibility, community, and engagement for Web3 projects.
Responsibilities:
Plan and execute effective Web3 and crypto marketing strategies
Promote projects across Twitter (X), Telegram, Discord, Reddit, and other relevant platforms
Manage and grow crypto communities organically
Create and run campaigns for token launches, NFTs, DeFi, or blockchain platforms
Collaborate with influencers and manage strategic partnerships
Analyze campaign performance and optimize marketing strategies
Stay up to date with the latest Web3 and crypto trends
Requirements:
Proven experience in Web3, Crypto, Blockchain, NFT, or DeFi marketing
Strong understanding of the crypto audience and market dynamics
Experience with community management and social media growth
Knowledge of token launches, airdrops, and crypto promotions
Excellent communication skills
Ability to work independently and deliver measurable results
Nice to Have:
Experience with paid ads on crypto-friendly platforms
Influencer marketing experience in the Web3 space
Past success stories, case studies, or campaign metrics
**Project Code:** SEAGOLL 2.0
**Procurement Mode:** **Open Competitive Bidding**
**Project Type:** Upgrade of an existing live digital asset exchange (NOT a greenfield build)
**Engagement Model:** Software outsourcing or co-development
**Delivery Model:** Full source code + deployment + technical handover
---
## **1. Procurement Statement (Important)**
This project is issued under an **open bidding / open tender** process.
* No pricing guidance is provided by the issuer
* Vendors are required to submit **their own technical and commercial proposals**
* Evaluation will be based on:
* Technical capability
* Architecture quality
* Relevant experience
* Delivery methodology
* Risk control and compliance understanding
* Price will be evaluated **only after technical qualification**
---
## **2. Project Background & Objectives**
SEAGOLL is an operational digital asset exchange platform.
We are initiating a major system upgrade to **SEAGOLL 2.0**, with the objective of building a **next-generation, compliant, and transparent digital asset exchange infrastructure**.
Key strategic goals include:
* Node-based economics via **Node Seat NFTs**
* **NST behavior mining** with Quest-based engagement
* **AI-powered quantitative trading** (high-risk, non-custodial, fully transparent)
* **AQE low-risk traditional finance module**
* **On-chain insurance pool (AQEL)** and **on-chain trust pool (AQEF)**
* Node Seat–based **revenue sharing**
* Full **AML / compliance monitoring**
* Advanced **real-time data visualization and transparency**
---
## **3. Overall Technical Scope**
### **3.1 Mandatory Architecture Requirements**
Bidders must propose a production-grade architecture covering:
* Backend: Microservices architecture
(Java / Go / Node.js acceptable; rationale required)
* Frontend: Web (React or Vue); Mobile optional
* Real-time data: WebSocket
* Event streaming: Kafka or equivalent
* Databases: MySQL / PostgreSQL + Redis
* Blockchain: EVM-compatible (NFTs, tokens, on-chain events)
* Security: RBAC, audit logs, AML integration
* Deployment: Docker-based CI/CD
---
## **4. Functional Scope (Core Modules)**
### **4.1 Core Trading System**
* Spot trading
* Basic derivatives / futures
* Real-time order book, trades, and K-line charts
---
### **4.2 NST Behavior Mining & Quest System**
* Full behavior tracking (trading, wallet actions, referrals, etc.)
* NST calculation engine
* User levels V0–V8
* Admin-configurable Quest/task system
---
### **4.3 Node Seat NFT System**
* Seat categories: Basic / VIP / Genesis / AQE Seats
* Node Seat implemented as **functional NFTs**
* One-time purchase and subscription models
* Seat trading and auction marketplace
* Seat lifecycle and status management
---
### **4.4 Node Seat Revenue Sharing**
* Revenue sources include:
* Trading fees
* Listing and promotion fees
* Earn / AQE / AI Quant service income
* Revenue pooling and weight-based distribution
* Periodic snapshots and distributions
* Transparent frontend visualization
* **AQEL**: On-chain insurance pool
* **AQEF**: On-chain trust pool
* Event-driven execution (insurance / trust events)
* Transparency center showing pool size and event history
---
### **4.10 AML & Compliance System (Mandatory)**
* Risk scoring engine
* Transaction and behavior monitoring
* Freeze / unfreeze workflows
* Compliance case management backend
---
## **5. Frontend Requirements**
* All revenues must be clearly visualized
* AI Quant must show **real-time trading behavior**, not only results
* AQE must emphasize stability (NAV curves, not short-term K-lines)
* Dashboards must include:
Bidders should propose a realistic timeline.
As reference only, the project is expected to be delivered in **multiple phased milestones over several months**, covering:
* Core system and node economics
* AI Quant and AQE modules
* AML, backstop layer, and system hardening
Final scheduling will be agreed after technical evaluation.
---
## **8. Bidder Qualification Requirements**
Bidders should clearly state:
1. Experience with **production-grade digital asset exchanges**
2. Experience with **AI quantitative trading systems**
3. Experience implementing **AML / compliance frameworks**
4. Willingness to deliver **full source code ownership**
5. Acceptance of **independent security and code audits**
---
## **9. Evaluation Process**
* **Stage 1:** Technical proposal review
* **Stage 2:** Architecture and capability assessment
* **Stage 3:** Commercial proposal review (qualified bidders only)
* **Stage 4:** Final selection and contract negotiation
SEAGOLL reserves the right to accept or reject any proposal.
---
## **10. Short Project Summary (For Tender Listings)**
> SEAGOLL 2.0 is an open-tender upgrade project for a live digital asset exchange,
> featuring node-based economics, AI-driven quantitative trading,
> on-chain insurance and trust pools, and full AML compliance.
> We invite qualified technology partners to submit competitive proposals.
Skills: Node.js, Redis, Blockchain, Docker, Web Development, Backend Development, Frontend Development, API Development, Microservices, AI Development
Fixed budget:
20,000 - 50,000 USD
14 hours ago
Websites, IT & Software, Design, Media & Architecture, Node.js, Redis, Blockchain, Docker, Web Development, Backend Development, Frontend Development, Editing, API Development, Microservices, AI Development
US-Licensed Attorney Needed for Legal Memo on Advertising Licenses
Applied
$350
15 hours ago
Client Rank
- Good
Payment method verified
Phone number verified
$6 527 total spent
5 hires
3 jobs posted
100% hire rate,
1 open job
46.51 /hr avg hourly rate paid
114 hours paid
5.00
of 5 reviews
Registered: Feb 3, 2025
Germany
Berlin
08:49
4
I am seeking a US-licensed attorney (barred in any US state) or US law firm to draft a concise legal memo (3–5 pages) confirming I do not require any advertising licenses in the USA, UK, European Union (EU), or India to run ads on X (formerly Twitter).
Business Details:
I operate a newsletter focused on blockchain technology reporting and analysis.
No sales of products, services, tokens, cryptocurrencies, or financial instruments.
Content is purely informational/educational -no promotions, endorsements, or commercial offers.
Example topics: Blockchain developments, industry news (no specific tokens mentioned).
Memo Requirements:
Analyze relevant ad policies/laws: X's financial services rules, FTC (US), ASA (UK), EU DSA/DMA, Indian ASCI guidelines.
Confirm no licenses needed (e.g., MSB, VASP, MiCA, etc.) since no regulated activities.
Cite key statutes, policies, and precedents (e.g., X Ads Policy 2026, FTC truth-in-advertising).
Format: Professional PDF with legal license number / address , delivered in 3–5 business days.
To Apply: Confirm US bar status, estimated timeline/cost, and relevant experience.
Note: This memo is for internal/X compliance submission only.
Fixed budget:
350 USD
15 hours ago
Client's recent history (5 works)
Develop a Fully Functional Chrome Extension
To freelancer:
5
Mustapha has been a great dev. Understands the requirements, he brought ideas to the project. Very easy to work with and…Mustapha has been a great dev. Understands the requirements, he brought ideas to the project. Very easy to work with and would recommend highly!
To client:
5
Another great experience working with James
Mar 2025 - Aug 2025 35 hrs @ $55.10/hr Billed: $1,910.01
Enhancement of Chrome Extension for Language Learning App
To freelancer:
5
Mustapha did a great job on my Chrome extension and web app. I had used two developers before, and they failed to delive…Mustapha did a great job on my Chrome extension and web app. I had used two developers before, and they failed to deliver. Mustapha came with energy and had great ideas; he implemented new ideas and made my project look, feel, and function much better. I have already started a second project with him because I'm confident in his skills. I've worked with dozens of developers on different platforms and Mustapha is one of the best.
To client:
5
I truly appreciated collaborating with James, one of the finest clients I've had to date.
I enjoyed working with Urvik. Thanks for your help on the designs
To client:
5
James It was a pleasure working with you on this design project, and I appreciate the opportunity. I’m glad we successfu…James It was a pleasure working with you on this design project, and I appreciate the opportunity. I’m glad we successfully completed it, and I look forward to collaborating again in the future on new opportunities.
Feb 2025 - Mar 2025 FIXED $420.00
30 minute consultation
To freelancer:
5
Great experience, no fluff, straight to the point advice I needed to move my Airbnb business forward.
I’m launching a new cryptocurrency and want it in front of active, genuine crypto investors on Twitter. I’m looking for someone who already manages (or can create and quickly grow) a crypto-focused Twitter account with a real, engaged following.
The core task is product promotion: craft and publish a short series of tweets, threads, or spaces announcements that highlight my coin’s value proposition, build excitement, and drive traffic to our website and Telegram channel. Your audience should be demonstrably interested in trading, DeFi, or blockchain news—no generic tech crowd, please.
What I need from you
• A Twitter handle with a proven or rapidly provable crypto-investor follower base
• A clear promotional plan: post formats, frequency, key hashtags, and timing
• Live links/screenshots to verify engagement (likes, retweets, comments, impressions) during the campaign
• A brief performance recap once the content is live
If you already run an account that fits, let me know its current follower count and average engagement rate. If you intend to create and scale a new one, outline how you’ll attract the right audience fast. Tools like TweetDeck, Hootsuite, or native Twitter Analytics are fine—use whatever you’re comfortable with; just be ready to share the metrics.
I’m ready to get started as soon as I see a strategy that aligns with our goal: genuine visibility among crypto investors.
Skills: Internet Marketing, Twitter, Social Media Marketing, Digital Marketing, Twitter Marketing, Content Creation, Cryptocurrency
Fixed budget:
600 - 1,500 INR
16 hours ago
Websites, IT & Software, Writing & Content, Sales & Marketing, Twitter, Digital Marketing, Internet Marketing, Social Media Marketing, Twitter Marketing, Content Creation, Cryptocurrency
We are looking crypto marketing individual or an agency to launch a token sale/ICO
Applied
$10,000
17 hours ago
Client Rank
- Risky
Payment method not verified
Phone number verified
1 open job
no reviews
Registered: Jan 30, 2026
Bangladesh
Naogaon
12:49
1
Crypto Marketing Freelancer (Token Sale Experience Required)
We are looking to hire an experienced crypto marketing freelancer (agency considered, but freelancer preferred) with proven experience in raising funds through token launches and public token sales.
This role focuses on scaling an existing project, not building from scratch.
Project Overview
Upcoming token sale in the crypto market:
Website giafashion.io
Presale will consist of 2–3 public sale rounds
Token Generation Event (TGE) followed by Uniswap listing. The sale will be on our own website, not on launchpads.
Marketing campaign duration: 2–3 months prior to first round.
Current Traction & Channels
We already have established accounts and ongoing activity:
Telegram: 12,000–13,000 subscribers
Instagram & Twitter (X): a few thousand followers each
Discord: minimal presence
LinkedIn: official company page
Cointelegraph: a few thousand followers
Ongoing activities include:
Community moderation & posting
Shilling and engagement campaigns
AMA sessions
2 YouTube reviews by KOLs
All core accounts are set up ,we are not starting from zero. The goal is to scale traction, engagement, and conversion leading into the token sale.
What We’re Looking For
Direct experience with token launches, presales, and public sales
Strong understanding of crypto-native growth (Telegram, Twitter/X, KOLs, AMAs)
Ability to execute, not just extensive GTM plan.
Clear focus on raising awareness, demand, and investor participation
What You Must Provide
Portfolio with clear, verifiable results
Previous token launches or fundraising campaigns
Metrics and outcomes where possible
KOL packages (YouTube, Twitter/X, Telegram, etc.)
Marketing strategy overview (concise and practical)
Please avoid long, generic go-to-market documents
Relevant case studies in the crypto space
Scope
No branding, account setup, or foundational work required
Focus is strictly on growth, visibility, and conversion
Execution-heavy role with measurable outcomes
If you have hands-on experience scaling crypto projects and successfully supporting token sales, we’d like to hear from you.
Looking for Technical Partner for FinTech / Blockchain-Based Investment Platform
Applied
$5,000
18 hours ago
Client Rank
- Risky
Payment method not verified
Phone number verified
1 open job
India
13:19
1
We are looking for an experienced software development partner (agency or strong team) to build a production-grade FinTech platform with blockchain elements.
This is a long-term project, not a small freelance task. We already have detailed functional requirements, technical architecture, and execution planning in place.
HIGH - LEVEL SCOPE:
The platform includes:
- User-facing web application (investors/customers)
- Admin & compliance dashboards
- Secure authentication & role-based access
- Wallet & transaction system
- Staking and rewards mechanisms
- Utility token logic (hybrid on-chain/off-chain)
- Audit logs and compliance controls
- Full REST API backend
What We Are Looking For:
We are looking for a team that:
- Has experience in FinTech and/or Blockchain projects
- Can handle full-stack development (backend, frontend, cloud)
- Understands security, scalability, and system architecture
- Is interested in a long-term technical partnership, not just short-term delivery
When Applying, Please Share
- Short team/company introduction
- Relevant similar projects
- Team size & roles
- Preferred tech stack
Important Note: This is not a meme coin or speculative project. We are building a real product with compliance, security, and long-term business vision.
Development of a Crypto Trading & P2P Exchange Website with Escrow System
Applied
$700
18 hours ago
Client Rank
- Medium
Payment method verified
2 jobs posted
1 open job
no reviews
Registered: Apr 21, 2020
Canada
Ottawa
04:49
3
We are seeking an experienced web developer or development team to build a secure, scalable, and user-friendly P2P cryptocurrency exchange website. The platform must support trading and wallet features for major tokens including USDT, USDC, and Bitcoin (BTC).
The application should include essential features such as a peer-to-peer marketplace, escrow protection system, crypto wallet integration, user verification (KYC), profile management, and automated deposit/withdrawal processes.
Our goal is to develop a platform similar to Binance P2P, Bybit P2P, or Paxful, but optimized for simplicity, speed, security, and a seamless user experience.
You must have built something not a random definition website. Ensure you put your portfolio to enable us access your proficiency.
Pls we are STRICTLY ON BUDGET and leave zero room for price negotiation. Apply only if it fits in within rate specification, adaptable schedule and ready to deliver in 8 WEEKS or LESS
1. User System & KYC
- Email/Phone login + optional Google/Apple
- Multi-level KYC with admin approval
- Rating system, trade history, and user limits
2. Wallet & Blockchain Integration
- Auto-generated deposit addresses
- BTC, USDT (TRC20/ERC20/BEP20), and USDC integration
- Live blockchain confirmations
- Hot/cold wallet handling (optional with full guidance)
3. Full P2P Marketplace
- Create/buy/sell orders
- Payment method selection
- Buyer–seller chat
- Order matching engine
- Review system
4. Escrow System
- Automatic crypto holding and release
- Dispute handling for admins
- Secure transaction verification
5. Deposits & Withdrawals
- Fee configuration
- 2FA for withdrawals
- Automated blockchain processing
6. Security Layer
- 2FA
- Device verification
- Anti-fraud triggers
- Encrypted communication
- Admin role-based access
7. Admin Dashboard
- User management
- KYC approvals
- Escrow disputes
- Fee/limit control
- Transaction monitoring
- Logs and analytics
Customer Support Representative at DeVerse
Applied
$3 - $10
/ hr
21 hours ago
Client Rank
- Medium
Payment method verified
Phone number verified
6 jobs posted
1 open job
no reviews
Industry: Tech & IT
Company size: 2
Registered: Aug 18, 2025
United Arab Emirates
11:49
3
Customer Support Representative at DeVerse
Position Overview
DeVerse is seeking a passionate and knowledgeable Customer Support Representative to join our growing team. This role is for someone who thrives at the intersection of technology, communication, and problem-solving. You will be the first line of support for our global user base, ensuring that wallet users have a seamless and secure experience navigating the decentralized web.
As a key member of our support team, you’ll play a crucial role in helping users set up, recover, and use our wallet confidently — guiding them through multi-chain transactions, DeFi integrations, and best practices for self-custodial security. If you’re excited by the idea of shaping the future of digital asset accessibility and have a strong understanding of blockchain fundamentals, we’d love to talk to you.
Key Responsibilities
1. User Support & Education
2. Deliver exceptional support via in-app chat, email, and social media
3. Assist users with wallet setup, recovery, and account management
4. Troubleshoot technical issues related to multi-chain transactions and integrations
5. Educate users on best practices for wallet security and safe Web3 navigation
Product Knowledge & Problem-Solving
1. Maintain a deep understanding of DeVerse wallet features and integrations
2. Support users with cross-chain swaps, bridge functionality, and dApp connectivity
3. Document recurring issues and provide feedback to product and engineering teams
4. Translate complex crypto concepts into simple, user-friendly explanations
Security & Compliance
1. Support users through secure account recovery flows
2. Identify and escalate suspicious activity or potential threats
3. Ensure all support interactions meet compliance and security standards
Community & Growth
1. Contribute to FAQs, knowledge bases, and community resources
2. Engage with the community across forums and social platforms
3. Provide insights to improve product design and user experience
Key Skills & Experience
1. Technical Understanding
2. Strong knowledge of blockchain fundamentals and major cryptocurrencies (Bitcoin, Ethereum, stablecoins)
3. Familiarity with custodial vs. self-custodial wallets
4. Understanding of DeFi protocols, multi-chain transactions, and wallet integrations
Customer Support Expertise
****2+ years of customer support experience, ideally in fintech or crypto
****Experience using help desk and ticketing systems (Zendesk, Intercom, or similar)
****Proven ability to resolve technical issues with clarity and empathy
Communication & Mindset
1. Excellent written and verbal communication in English
2. Ability to simplify complex technical concepts for non-technical users
3. Patience, empathy, and professionalism when handling challenging situations
4. Strong problem-solving and critical thinking skills
Bonus Points For:
1. Hands-on experience with crypto wallets and dApps
2. Background in financial services or crypto exchanges
3. Experience with mobile app troubleshooting (iOS/Android)
About DeVerse
DeVerse is an innovative tech company at the forefront of the decentralized web. We are building the next generation of financial and digital infrastructure by creating a wallet that is secure, user-owned, and accessible to everyone. Our mission is to push the boundaries of what’s possible with blockchain and Web3, while empowering users to take full control of their digital assets.
We offer a collaborative, remote-friendly environment where every team member makes a meaningful impact on our products, our users, and the future of digital finance.
⚡ At DeVerse, you won’t just be supporting users — you’ll be shaping how millions of people experience the decentralized internet.
We are operating a live custom Layer-1 blockchain network called Panchain and are looking for an experienced blockchain infrastructure / core protocol developer to help us migrate the entire blockchain network from existing servers to a new high-performance server environment.
Blockchain Explorer: https://scan.panchain.io/
This is a production network, not a test or academic setup.
Scope of Work
- Review existing Panchain Layer-1 blockchain architecture
- Migrate full chain data, node configurations, and validator setup to new servers
- Handle state data, blocks, peers, RPC, and networking
- Ensure zero or minimal downtime
- Reconfigure:
-- Node / validator configs
-- P2P networking & ports
-- RPC / API endpoints
-- Firewall & security rules
- Use snapshots / fast sync if required
- Validate:
-- Chain continuity
-- Block height
-- Consensus health
- Performance tuning post-migration
- Provide clear migration documentation
Required Expertise
- Proven experience with Layer-1 blockchain infrastructure
- Hands-on experience with custom or forked chains
- Deep understanding of:
-- Consensus mechanisms
-- Validator & full nodes
-- P2P networking
- Strong Linux server & DevOps skills
- Experience migrating live blockchain networks
- Familiarity with Ethereum-based / Cosmos / Substrate chains is a plus
To Apply, Please Share
- Your Layer-1 blockchain experience
- Networks you have worked on (mainnet preferred)
- Similar migration or infra projects
- Your migration approach
- Estimated timeline
We are looking for senior, hands-on engineers only — not beginners or generic Web3 developers.
Client's questions:
Have you worked on a live Layer-1 blockchain (mainnet)?
Describe your experience migrating or upgrading blockchain nodes or entire networks.
What is your approach to migrating a live blockchain network with minimal downtime?
How do you verify chain integrity after a server-to-server migration?
What tools or methods do you typically use for blockchain snapshots, fast sync, or data transfer?
Blockchain CTO / Consultant for Decentralized E-commerce Platform & Native Token Development
Applied
$80 - $120
/ hr
21 hours ago
Client Rank
- Medium
Payment method verified
Phone number verified
4 jobs posted
4 open job
no reviews
Registered: Jan 22, 2026
Philippines
Isabela
07:49
3
About the Project:
We’re building a decentralized e-commerce platform that aims to change the way people shop online. By using blockchain, we’re cutting out middlemen, reducing fees, and giving users more control over their transactions. Our native token will play a key role—used for payments, rewards, governance, and more. We’re looking for a CTO/Consultant to lead the tech side and bring our vision to life.
About the Token:
The native token is central to everything we do:
- Payments: The token will be used for transactions, making purchases secure and fee-free.
- Rewards: Users earn tokens for buying products, referring others, and engaging with the platform.
- Governance: Token holders can vote on major platform decisions like new features and changes.
- Staking & DeFi: The token will offer staking rewards and DeFi features, like liquidity mining.
- Discounts & Access: Tokens will unlock exclusive deals and discounts, giving users more value.
The token is the lifeblood of the platform, driving engagement and enabling everything from payments to governance.
What You’ll Do:
- Lead the Team: You’ll guide the development of the platform, from blockchain to front-end integration, and lead a growing team of developers.
- Platform Design: Oversee the architecture and integration of blockchain features, including smart contracts and token functionality.
- Token Integration: Lead the integration of our native token for payments, staking, rewards, and governance.
- Security & Optimization: Make sure everything is secure, efficient, and scalable as the platform grows.
- Strategy: Work closely with the executive team to align the tech vision with business goals.
What We’re Looking For:
- Experience as a CTO or in a senior technical leadership role, with strong blockchain and Web3 knowledge.
- Expertise in Solidity, Ethereum, and smart contract development.
- Hands-on experience with decentralized platforms and tokenomics.
- Strong leadership and team-building skills.
- Comfortable working in a fast-paced, startup environment.
Why Join Us?
As CTO or Consultant, you’ll be leading the tech development of a platform that could transform the e-commerce industry. This is your chance to shape the future of online shopping and blockchain technology. If you’re excited about Web3 and want to lead a team with real-world impact, we’d love to talk.
Hourly rate:
80 - 120 USD
21 hours ago
Web, Mobile & Software Dev, Blockchain, NFT & Cryptocurrency
Game Development & Blockchain Services – Ongoing Updates and Improvements
Applied
$20 - $30
/ hr
22 hours ago
Client Rank
- Good
Payment method verified
Phone number verified
$1 650 total spent
2 hires, 1 active
4 jobs posted
50% hire rate,
1 open job
5.00
of 1 reviews
Registered: Sep 18, 2024
Australia
Auburn
18:49
4
Job Description:
We are looking for an experienced Game Developer with Blockchain expertise to support ongoing updates, improvements, and feature enhancements for our existing game and blockchain-based services.
This role focuses on maintaining and upgrading current systems rather than building from scratch. You’ll work closely with our team to implement updates, optimize performance, fix issues, and enhance gameplay and blockchain functionality.
Scope of Work:
Update and improve existing game features (UI/UX, gameplay mechanics, performance)
The experience was smooth and professional from start to finish. Communication was clear, expectations were well defined…The experience was smooth and professional from start to finish. Communication was clear, expectations were well defined, and the process was efficient. I would highly recommend working together.
To client:
5
It was great working with this client. Communication was clear, the timeline was well-defined, and I delivered everythin…It was great working with this client. Communication was clear, the timeline was well-defined, and I delivered everything as proposed. I’d be more than happy to work with him again in the future 🙂
Dec 2025 - Jan 2026 FIXED $650.00
Web, Mobile & Software Dev, Game Design & Development
Experienced Full-Stack Web3 Developer for ChainHire Completion
Applied
~7 - 16 USD
23 hours ago
Client Rank
- not enough data
-
I am hiring an experienced Solana + Next.js full-stack developer to complete an existing project called ChainHire.
ChainHire is a freelancing platform where the platform itself acts as an on-chain escrow using Solana.
The project is partially completed. Your task is to finish remaining features, integrate and secure Solana smart contracts, make the app platform-independent, and deploy it to production.
We are seeking highly skilled and experienced Lead Blockchain Developers to join our dynamic team. As a leading company in the blockchain industry, we are committed to developing innovative solutions that push the boundaries of technology and create real-world value. The ideal candidates will possess a strong passion for blockchain technology, a deep understanding of decentralized systems, and a proven track record of leading complex projects from conception to deployment.
In this role, you will be responsible for designing, developing, and implementing blockchain-based applications and smart contracts. You will lead a team of developers, providing technical guidance and ensuring best practices are followed. Your expertise will be crucial in architecting scalable, secure, and efficient blockchain solutions tailored to meet diverse business needs. You will collaborate closely with product managers, designers, and other stakeholders to translate project requirements into technical specifications and deliverables.
The successful candidates should have extensive experience with blockchain platforms such as Ethereum, Binance Smart Chain, Solana, or others, and a solid understanding of consensus algorithms, cryptography, and security protocols. Proficiency in programming languages like Solidity, Rust, or Go is essential. Additionally, experience with blockchain development frameworks, tools, and testing environments is highly desirable.
As a Lead Blockchain Developer, you will stay updated on the latest industry trends and technological advancements, ensuring our solutions remain innovative and competitive. Strong leadership skills, excellent problem-solving abilities, and effective communication are vital for guiding your team and coordinating with cross-functional departments. You should be able to manage multiple projects, prioritize tasks efficiently, and deliver high-quality results within deadlines.
Joining our team means working in a fast-paced, collaborative environment where innovation is encouraged and your contributions have a direct impact on our success. If you are passionate about blockchain technology, eager to lead groundbreaking projects, and want to be part of a forward-thinking organization, we invite you to apply and become a key player in shaping the future of blockchain solutions.
Client's questions:
Include a link to your GitHub profile and/or website
Blockchain Technical Expert Needed for NFT Airdrop Platform Development
Applied
$45 - $80
/ hr
1 day ago
Client Rank
- Medium
Payment method verified
Phone number verified
3 jobs posted
2 open job
no reviews
Registered: Aug 2, 2025
Philippines
Binmaley
07:49
3
We are seeking a knowledgeable blockchain technical expert to assist in the development of our NFT Airdrop Platform and facilitate the creation of our own cryptocurrency token. The ideal candidate will have a strong understanding of blockchain technology, smart contracts, and NFT standards. You should be able to provide technical insights and contribute to the overall architecture of the platform. If you have experience in building blockchain applications and are passionate about NFTs, we'd love to hear from you!
We are looking for an experienced Blockchain Fullstack Lead Engineer to join our team. The ideal candidate should have extensive knowledge in blockchain technologies and a strong background in fullstack development. You will lead projects, design innovative solutions, and collaborate with cross-functional teams to implement decentralized applications. Your skills in smart contract development, front-end frameworks, and back-end integration will be essential for this role. If you have a passion for blockchain and are ready to take on challenging projects, we want to hear from you!
Blockchain Engineer Needed for Innovative Project
Applied
$40 - $80
/ hr
1 day ago
Client Rank
- Medium
Payment method verified
Phone number verified
2 jobs posted
2 open job
no reviews
Registered: Jan 20, 2026
Philippines
Pangasinan
07:49
3
We are seeking an experienced blockchain engineer to join our team for an exciting new project. The ideal candidate will have a strong understanding of blockchain technology, smart contracts, and decentralized applications. You will work closely with our development team to design and implement blockchain solutions that meet our project goals. If you are passionate about blockchain and want to be part of a cutting-edge initiative, we would love to hear from you!
Solidity Smart Contract and Web3 Frontend Developer Needed
Applied
$40 - $80
/ hr
1 day ago
Client Rank
- Medium
Payment method verified
Phone number verified
5 jobs posted
2 open job
no reviews
Registered: Jan 8, 2026
Brazil
04:49
3
We are seeking a skilled developer to assist with creating and deploying Solidity smart contracts, as well as building a Web3 frontend interface. The ideal candidate will have experience in blockchain development, particularly with Ethereum, and possess a strong understanding of Web3.js or ethers.js. You will work closely with our team to deliver a functional and user-friendly decentralized application (dApp). If you have a passion for blockchain technology and can turn ideas into reality, we would love to hear from you!
At Goldweb Solutions, we develop meaningful digital solutions for our clients, specializing in UX/UI design, web development, and mobile applications.
Currently, we are building a decentralized education platform leveraging the power of blockchain and need a Senior Blockchain Developer. Your role will be central to architecting and implementing the smart contract and web3 integrations. You will design secure and efficient smart contract systems and lead the integration with front-end applications. The ideal candidate will have deep expertise in Solidity, Ethereum, and decentralized application architecture.
This is a unique opportunity to solve complex problems and impact the future of education. If you are passionate about blockchain's potential, we encourage you to apply.
Client's questions:
Describe your recent experience with similar projects
What frameworks have you worked with?
Include a link to your GitHub profile and/or website
Please list any certifications related to this project
I already have a compiled Python-based crypto scanner, but a recent bug keeps it from doing its one main job: finding addresses that hold between 10 000 and 1 000 000 units and reflecting that balance straight in my Trust Wallet.
What I need fixed or added
• The scan filter must only flag wallets that meet the 10 k–1 M balance range.
• As soon as a match is found the balance has to appear in my Trust Wallet automatically (automatic balance update is the only Trust Wallet feature I care about right now).
• The scanner should handle both Bitcoin and Ethereum addresses without crashing; if you can keep the code flexible for other coins later, even better.
Tech details
The executable was generated from a Python 3 script that talks to public blockchain APIs. If you prefer, I can also send you the original .py file so you can work directly with web3.py, bitcoinlib or any library you trust, then ship a clean rebuilt .exe.
Proof you can handle it
Please include a link or two to past work on blockchain integrations or wallet automation. No need for a full proposal—just something that shows you have already solved a similar problem.
Deliverables
1. Updated Python source and rebuilt executable.
2. Quick README explaining any new dependencies and how to launch the scan.
3. Short demo (screencast or live) proving that a qualifying address updates the Trust Wallet balance in real time.
Development of a Solana Telegram Alert Bot
Applied
$500
1 day ago
Client Rank
- Risky
Payment method not verified
Phone number verified
1 open job
Mexico
01:49
1
We are seeking a skilled developer to create a Telegram alert bot that operates on the Solana blockchain. The bot should be able to track specific events, transactions, or updates related to Solana and send real-time alerts to a Telegram channel. The ideal candidate will have experience with Solana protocols and Telegram bot development. This is a great opportunity for someone who is passionate about blockchain technology and wants to contribute to our growing project.
We are building a B2B cross-border payments platform integrating Airwallex, Currencycloud, and Column. This is a core engineering role with end-to-end ownership of payments infrastructure.
We are looking for a senior backend engineer with real fintech payments experience (not just crypto or consumer apps).
What you will own
• Payments orchestration across multiple providers (local rails, SWIFT, FX)
• Webhook-driven payment state machines (idempotency, retries, out-of-order events)
• Internal ledger & reconciliation (pending vs settled balances, fees, FX)
• Secure API design, background workers, and observability
• Production-grade correctness — this system handles real money
Must-have experience
• Backend engineering in fintech / payments / banking infrastructure
• Strong understanding of event-driven systems
• Experience with ledger design or financial reconciliation
• Hands-on with third-party financial APIs (payments, FX, wallets)
• TypeScript/Node, Java, or similar (Postgres required)
Nice to have (not required)
• Airwallex, Currencycloud, Stripe Treasury, Wise, or similar
• Exposure to ACH / SEPA / SWIFT
• Startup or 0→1 fintech build experience
What this is NOT
• Not a frontend role
• Not a blockchain-only or DeFi role
• Not a junior or learning position
Hourly rate:
20 - 40 USD
1 day ago
Client's recent history (3 works)
Branding Package
No feedback given
To client:
5
Great experience working with Frank. Clear requirements and smooth collaboration.
Nov 2025 - Nov 2025 FIXED $150.00
SEO services
To freelancer:
5
Great freelancer. Easy to work with. Great attention to details.
To client:
2.25
This project was extremely challenging due to poor communication and unclear expectations. The client often contacted me…This project was extremely challenging due to poor communication and unclear expectations. The client often contacted me outside of Upwork, even after I requested to keep all communication on the platform. Meetings were scheduled at the last minute with no consideration for time zones, and the project goals were never clearly defined. Despite multiple attempts to clarify direction, it remained unclear what the client ultimately wanted to achieve. I would not recommend this client for collaborative or time-sensitive projects.
Aug 2025 - Nov 2025 FIXED $200.00
LLM Chatbox Development for Healthcare App
No feedback given
To client:
5
I really enjoyed working with the Frank. Looking forward to the more collaborations.
Research Specialist for Confidential High-Level Project
Applied
$120
1 day ago
Client Rank
- Medium
Payment method verified
Phone number verified
$888 total spent
13 hires, 5 active
130 jobs posted
10% hire rate,
7 open job
5.00
of 5 reviews
Registered: Mar 26, 2023
United States
Chicago
01:49
3
We are working on a confidential, high-level research project related to the Bitcoin and blockchain space. This is a challenging project that requires strong research skills, creative thinking, and discretion.
Your main responsibility will be researching and identifying private individuals, companies, or connectors in the blockchain/Bitcoin ecosystem and helping determine where and how these individuals can be approached professionally. $120/ month. You will get a huge bonus if we get a client.
Custom Trading Bot Made To Pass Prop Firm Challenges
Applied
not specified
1 day ago
Client Rank
- Risky
Payment method not verified
Phone number verified
1 open job
United States
01:49
1
Hi Boss, I need a trading bot that can bypass prop firm challenges/ combines. I know you can't guarantee the passing of this but I want the bot to essentially either make the trade on its own, or give me feedback on the best trade to execute . I need this bot to be bulletproof and integrated with telegram bot api if possible . I dont want any detection whatsoever .
