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$30/hr
$20K+ earned
Offers consultations
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When engineering teams are scaling fast, there's usually a gap — more work than the core team can handle, but not enough to justify a full hire yet. That's exactly where I come in.
I'm a senior full-stack engineer with 5+ years building production-grade SaaS platforms, AI-powered applications, and cloud infrastructure. I embed directly into your team — picking up your stack, following your processes, and contributing from day one without the usual onboarding drag.
When projects need more hands, I have a trusted team of senior engineers I work with regularly. So you get the consistency of working with me, with the option to scale up execution when you need it.
What I bring to your team:
— Full-Stack Development (React, Next.js, Node.js, TypeScript, REST & GraphQL)
— AI & LLM Integration (OpenAI, Claude, LangChain, RAG pipelines, workflow automation)
— Cloud & DevOps (AWS, GCP, Docker, Kubernetes, CI/CD pipelines)
— Backend & Data (PostgreSQL, MongoDB, Redis, event-driven systems)
I've worked with startups and scaling companies where things move fast and standards still matter. I write clean code, communicate proactively, and flag problems before they become blockers.
If your team is growing and you need a senior engineer who can hit the ground running — let's have a quick call and see if it's a fit.
Associated with
Orgin³ Systems
$20K+
earned
$20/hr
$400+ earned
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Hi, I help 𝐛𝐮𝐬𝐢𝐧𝐞𝐬𝐬𝐞𝐬 𝐚𝐮𝐭𝐨𝐦𝐚𝐭𝐞 repetitive work using 𝐀𝐈 so they can 𝐬𝐚𝐯𝐞 𝐭𝐢𝐦𝐞, 𝐫𝐞𝐝𝐮𝐜𝐞 𝐜𝐨𝐬𝐭𝐬, 𝐚𝐧𝐝 𝐬𝐜𝐚𝐥𝐞 𝐟𝐚𝐬𝐭𝐞𝐫.
If you're tired of 𝐦𝐚𝐧𝐮𝐚𝐥 𝐭𝐚𝐬𝐤𝐬, slow workflows, or missed opportunities —𝐈 𝐜𝐚𝐧 𝐟𝐢𝐱 𝐭𝐡𝐚𝐭.
What I can build for you:
=======================
AI chatbots using ChatGPT (customer support, lead generation)
Workflow automation (Zapier / Make .com)
CRM & business process automation
AI-powered content & email systems
Custom GPT tools for your business
Real results:
=======================
Saved clients 15–30 hours per week
Automated lead generation & follow-ups
Reduced manual work by up to 70%
🧠 Tools I use:
=======================
ChatGPT, Make .com, Zapier, Airtable, APIs, Google Sheets
Why work with me?
====================
Clear communication
Fast delivery
Focus on real business results (not just tech)
Send me a message and let’s automate your workflow.
$20/hr
$4K+ earned
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𝗜 𝗮𝗺 𝗖𝗵𝗮𝗵𝗮𝘁 a Full-stack and Blockchain Developer with nearly 𝗮 𝗱𝗲𝗰𝗮𝗱𝗲 𝗼𝗳 𝗲𝘅𝗽𝗲𝗿𝗶𝗲𝗻𝗰𝗲 in providing blockchain solutions to Startups and enterprises in DApp, Blockchain technology, Web application, Game, and Mobile app development.
We're an expert team of developers 𝗶𝗻 𝗜𝗻𝗱𝗶𝗮, 𝗦𝗮𝘂𝗱𝗶 𝗔𝗿𝗮𝗯𝗶𝗮 𝗮𝗻𝗱 𝗨𝗔𝗘, reviewing business models across the globe and helping them to adjust their businesses within the growing blockchain ecosystem. Since diving into blockchain in 2016, we’ve built crypto exchanges (P2P and CEX) to NFT marketplaces and advanced smart contracts. Whether you’re launching a DeFi protocol, tokenizing assets, or building a metaverse app, we can make it happen.
Tools & Tech Stack:
🔹𝗟𝗮𝗻𝗴𝘂𝗮𝗴𝗲𝘀: Solidity, Rust, JavaScript, TypeScript, Python, Node.js
🔹𝗕𝗹𝗼𝗰𝗸𝗰𝗵𝗮𝗶𝗻 𝗧𝗼𝗼𝗹𝘀: Web3.js, Ethers.js, Solana Web3, Truffle, Hardhat, IPFS
🔹𝗙𝗿𝗮𝗺𝗲𝘄𝗼𝗿𝗸𝘀: React, Next.js, React Native, Express.js
🔹𝗗𝗮𝘁𝗮𝗯𝗮𝘀𝗲𝘀: MongoDB, PostgreSQL, MySQL, Redis
🔹𝗜𝗻𝗳𝗿𝗮𝘀𝘁𝗿𝘂𝗰𝘁𝘂𝗿𝗲: AWS, Docker, Kubernetes, CI/CD pipelines
🔹𝗧𝗲𝘀𝘁𝗶𝗻𝗴: ETH (Goerli), Binance (BNB), Polygon (Matic), Tron (Sasta)
What we can do?
🔹𝗕𝗹𝗼𝗰𝗸𝗰𝗵𝗮𝗶𝗻 & 𝗪𝗲𝗯𝟯 𝗦𝗼𝗹𝘂𝘁𝗶𝗼𝗻𝘀: Design and deploy dApps, smart contracts (Solidity, Rust), NFTs (ERC-721, ERC-1155, BEP20), DeFi protocols, DAOs, cross-chain integrations, metaverse development (VR/AR, virtual worlds), and blockchain game development (GameFi, play-to-earn).
🔹𝗦𝗼𝗹𝗮𝗻𝗮 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁: High-performance smart contracts, DEXs, and dApps using Rust, SPL tokens, and Solana’s ecosystem for fast, low-cost transactions.
🔹𝗘𝘁𝗵𝗲𝗿𝗲𝘂𝗺 & 𝗠𝗼𝗿𝗲: Expertise in Ethereum, Binance Smart Chain, Polygon, Tron, Layer 2 solutions (Optimism, Arbitrum, zkSync), and enterprise blockchains (Hyperledger, Quorum) for secure deployments.
🔹𝗙𝘂𝗹𝗹-𝗦𝘁𝗮𝗰𝗸 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁: Build intuitive web and mobile apps using MERN (MongoDB, Express.js, React, Node.js), Next.js, React Native, and AI-blockchain integrations for smart automation.
🔹𝗦𝗽𝗲𝗰𝗶𝗮𝗹𝗶𝘇𝗲𝗱 𝗦𝗲𝗿𝘃𝗶𝗰𝗲𝘀: NFT marketplace development (including Whitelabel solutions), token development, stablecoin development (USDT, USDC, custom), cryptocurrency development, ICO/IDO/IEO launchpads, real estate tokenization, cross-platform wallets (multi-currency, custodial/non-custodial), DEX development (Automated Market Making, liquidity pools), payment gateway integration, and security-focused smart contract audits (using MythX, Slither).
🔹𝗜𝗻𝗱𝘂𝘀𝘁𝗿𝗶𝗲𝘀 𝘄𝗲'𝘃𝗲 𝘄𝗼𝗿𝗸𝗲𝗱 𝘄𝗶𝘁𝗵: FinTech, Healthcare, Supply Chain, Real Estate, Insurance, Retail, and CBDC/enterprise blockchain solutions.
𝗚𝗼𝘁 𝗮 𝗽𝗿𝗼𝗷𝗲𝗰𝘁 𝗶𝗻 𝗺𝗶𝗻𝗱? We’d love to hear about it.
✉️My TAT is short, hit the "𝗜𝗻𝘃𝗶𝘁𝗲" at the top of my profile for a quick chat.
𝗣𝗦: Blockchain consultancy available for free.
Associated with
WebMob Software Solutions
$5K+
earned
$30/hr
$20K+ earned
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I am a blockchain focused developer working within TeamQ, delivering Solidity smart contracts, Web3 applications, and full stack MERN dApps. Alongside blockchain engineering, I also build and integrate AI driven backend systems using modern LLM tools and Python frameworks. My work spans smart contract logic, NFT infrastructure, scalable Web3 frontends, and AI powered application modules.
- Blockchain | Web3
- ERC20 | ERC721 | ERC1155 smart contracts
- NFT minting systems | metadata pipelines | reveal logic
- Wallet integration using Ethersjs | Web3js
- Hardhat testing | gas usage checks
- Deployments on Ethereum | Polygon | BSC
- IPFS workflows for NFT assets
- Full Stack | Application Layer
- React | Node | Express | MongoDB | Typescript
- REST API design | backend module development
- AWS deployments with S3 | EC2 | Route53
- AI Systems | LLM Integrations
- LLM based features using OpenAI GPT
- Python Flask AI modules supporting application workflows
Data retrieval and validation pipelines for structured inputs
Automated user guidance | document handling | analysis modules
I have delivered NFT collections up to 10000 items, minting platforms, metadata systems, and scalable production Web3 applications. Within TeamQ, I follow strict contract review, testing standards, and deployment best practices across blockchain and AI based systems.
If you need smart contract development, Web3 integration, or AI backed application features, share your scope and chain. I will provide a precise technical plan and milestone structure.
$45/hr
100%
Job Success
$1K+ earned
Offers consultations
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I'm a DeFi developer specializing in Flash Loan Arbitrage, MEV (Maximal Extractable Value) strategies, and high-frequency trading (HFT) bots for Ethereum, Solana, and BSC. With 5+ years building production-ready MEV searchers, flash-loan contracts, and cross-exchange arbitrage systems, I execute strategies in sub-second timeframes with gas-optimized code and capital protection.
✅ WHAT YOU GET:
• Higher win-rate through faster execution in competitive blocks
• Increased profitability via gas-optimized, capital-efficient strategies
• Reduced risk from failed trades, frontruns, exploits, and reorgs
• Production-ready systems deployed with audit-level security discipline
• Sub-second execution via private RPCs and Flashbots/Jito bundles
🔧 CORE SERVICES:
MEV Searcher Systems
• Front-running, sandwich, and liquidation strategies
• Private bundle submission via Flashbots (Ethereum) & Jito (Solana)
• Reduced competition & failed transactions using mempool analysis
Flash Loan Arbitrage
• Custom smart contracts using Aave v3 & Balancer protocols
• Multi-step arbitrage with zero upfront collateral required
• Gas-optimized Solidity (Yul/Assembly) for maximum net returns
• Ethereum flash loan implementation with Remix IDE & MetaMask
DEX/CEX Arbitrage Bots
• Cross-exchange bots for Binance, Bybit, Raydium, Jupiter, Kraken
• Triangular & spatial arbitrage strategies (not guesswork)
• Consistent execution with API integration for Binance/Bybit
Low-Latency HFT Systems
• Rust & Python execution engines for sniping & market-making
• Millisecond-level optimization for high-frequency strategies
• Memory-safe Rust code for Solana/Anchor programs
🛡️ SECURITY & INFRASTRUCTURE:
• Sub-second execution via private RPCs
• Gas-efficient Solidity with Yul/Assembly optimization
• No private key access, no custodial risk
• Audit-level security discipline & smart contract auditing
• Cybersecurity for decentralized networks
🧠 TECH STACK:
Languages: Solidity, Rust (Solana/Anchor), Python, Node.js, Vyper
Infrastructure: Flashbots, Jito, Private RPCs, Web3.js, Ethers.js
Protocols: Uniswap v3, Aave v3, Balancer, Jupiter, Binance, Bybit, Kraken
Blockchain: Ethereum, Solana, BSC, Layer 2 (Arbitrum Stylus)
Tools: Remix IDE, MetaMask, On-chain analytics, Predictive modeling
🎯 I WORK BEST WITH:
• Traders scaling automated MEV/arbitrage strategies
• Crypto funds needing speed + reliability + capital safety
• Web3 teams requiring secure, production-grade smart contracts
• DeFi protocols needing cross-chain interoperability solutions
• DAOs requiring blockchain engineers for infrastructure
💬 Serious about automation, execution speed, and capital safety?
Let's build a system tailored to your strategy, not a generic bot.
📩 Message me to discuss your project. I respond in 0-4 hours.
$35/hr
100%
Job Success
Available now
Offers consultations
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Hi, I am Noman Ul Haq, a blockchain developer and full-stack web expert specializing in building secure, scalable, and intuitive Web3 solutions.
I help businesses and startups launch, tokenize, and scale through smart contract development, DApp deployment, and cutting-edge DeFi architecture. With a strong background in both backend smart contracts and frontend UI/UX, I deliver end-to-end platforms ready for real-world adoption.
🔗 What I Offer:
✅ Smart Contract Development (ERC-20, ERC-721, ERC-1155, SPL, custom logic)
✅ DApps & DeFi Platforms (staking, farming, governance, bridging, DAO setup)
✅ ICO/IDO Launchpad Solutions (multi-stage presale, token creation, vesting, liquidity lock)
✅ NFT Marketplaces (minting, trading, royalties, lazy minting)
✅ Web Development (React, Next.js, Tailwind CSS, full UI/UX integration)
I’ve successfully delivered blockchain systems across Ethereum, BSC, Solana, Polygon, and more. Whether you're building your token economy, launching a DeFi ecosystem, or designing a user-friendly NFT marketplace, I can help bring your vision to life.
Let’s turn your idea into a Web3 reality — reach out, and let’s get started.
United States
$120/hr
100%
Job Success
$1M+ earned
Available now
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California-based programmer with an extensive background in a variety of technologies, including desktop, mobile, and web platforms.
I deliver high quality software by communicating with my clients effectively and working tirelessly to understand their exact needs for a project. With a thorough analysis of the problem and an effectively designed solution, I'm able to leverage years of independent software experience to implement and deliver your product quickly and effectively.
I graduated from Santa Clara University with a Master's degree in Software Engineering in 2012, and have spent the last decade working with clients all over the Silicon Valley area.
Here on Upwork, I've achieved and currently hold the Top Rated, Top Rated Plus, and Expert-Vetted talent badges - which are the highest the platform offers. I've also acquired AWS certifications in a variety of disciplines, all of which contribute to my broad understanding of technical domains and enhance my ability to design and implement effective solutions tailored to your project's needs.
I strive to delight my clients with every project I undertake, and I would love to do the same for you. Please reach out if you have any questions!
$80/hr
100%
Job Success
$6K+ earned
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Web3 developer and blockchain architect specializing in smart contract development (Solidity), DeFi protocols, and trading bot systems.
I build: smart contracts, DeFi/CeDeFi platforms, wallet integration, token-gated systems, trading bots, blockchain APIs, RollUp, Oracle, CrossChain Bridges.
I consider: Security, Scalability, Cost, Decentralization, Performance, Tokenomics
Tech: Solidity,Smart Contracts, Web3.js, Ethers.js, Node.js, TypeScript, Python, Ethereum, Polygon, Arweave, IPFS, gas fee,
Familiar with : Bitcoin, Ethereum, Solana, Arbitrum, OP Stack, Base, Polygon, BSC, Tron, EOS, Fabric, Oracle, Chainlink, LayerZero, CCIP, Wormhole, AA wallet (Account Abstraction), DePIN,
Recent work: CeDeFi institutional infrastructure, Web3 archival system with wallet auth, DePIN Layer 2 blockchain.
Alex M.
has worked
.
$25/hr
100%
Job Success
$9K+ earned
Available now
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I help businesses turn complex ideas into scalable, production-ready digital products.
With a strong combination of 𝗣𝗿𝗼𝗷𝗲𝗰𝘁 𝗠𝗮𝗻𝗮𝗴𝗲𝗺𝗲𝗻𝘁 expertise, 𝗧𝗲𝗰𝗵𝗻𝗶𝗰𝗮𝗹 𝗟𝗲𝗮𝗱𝗲𝗿𝘀𝗵𝗶𝗽, and 𝗦𝗲𝗻𝗶𝗼𝗿 𝗙𝘂𝗹𝗹-𝗦𝘁𝗮𝗰𝗸 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁 experience, I bridge the gap between business vision and technical execution. Whether you need to build a system from scratch, improve an existing platform, or scale a growing product, I deliver clean, efficient, and reliable solutions built for long-term success.
𝗪𝗵𝗮𝘁 𝗜 𝗕𝗿𝗶𝗻𝗴 𝘁𝗼 𝘁𝗵𝗲 𝗧𝗮𝗯𝗹𝗲
➜ 𝗘𝗻𝗱-𝘁𝗼-𝗘𝗻𝗱 𝗢𝘄𝗻𝗲𝗿𝘀𝗵𝗶𝗽
I manage the full development lifecycle from discovery and planning to architecture, development, deployment, and ongoing maintenance.
➜ 𝗧𝗲𝗰𝗵𝗻𝗶𝗰𝗮𝗹 𝗟𝗲𝗮𝗱𝗲𝗿𝘀𝗵𝗶𝗽
I lead distributed teams, maintain high code quality standards, conduct architecture reviews, and ensure projects are delivered on time without compromising performance or security.
➜ 𝗕𝘂𝘀𝗶𝗻𝗲𝘀𝘀 𝗮𝗻𝗱 𝗣𝗿𝗼𝗱𝘂𝗰𝘁 𝗔𝗹𝗶𝗴𝗻𝗺𝗲𝗻𝘁
As a Project Manager with strong technical expertise, I translate business requirements into clear technical roadmaps. This reduces miscommunication, increases efficiency, and accelerates delivery.
𝗧𝗲𝗰𝗵𝗻𝗶𝗰𝗮𝗹 𝗘𝘅𝗽𝗲𝗿𝘁𝗶𝘀𝗲
➜ 𝗕𝗮𝗰𝗸𝗲𝗻𝗱 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁
Python with Django, FastAPI, and Flask
Node.js with Express and NestJS
REST and GraphQL API development
Microservices and distributed systems
Authentication, security, and performance optimization
➜ 𝗙𝗿𝗼𝗻𝘁𝗲𝗻𝗱 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁
React.js including Hooks, Context, Redux, and Next.js
Modern UI implementation
Responsive and scalable component architecture
➜ 𝗗𝗮𝘁𝗮𝗯𝗮𝘀𝗲 𝗮𝗻𝗱 𝗖𝗹𝗼𝘂𝗱
PostgreSQL, MySQL, MongoDB
AWS, Azure, and GCP
Docker and CI/CD pipelines
System architecture and DevOps strategy
𝗜𝗻𝗱𝘂𝘀𝘁𝗿𝗶𝗲𝘀 𝗜 𝗛𝗮𝘃𝗲 𝗪𝗼𝗿𝗸𝗲𝗱 𝗪𝗶𝘁𝗵
➜ SaaS platforms
➜ FinTech
➜ HealthTech
➜ E-commerce
➜ Enterprise internal tools
➜ Startups from MVP to scale
𝗛𝗼𝘄 𝗜 𝗪𝗼𝗿𝗸
➜ Clear communication and structured progress updates
➜ Agile and Scrum methodologies
➜ Milestone-driven execution
➜ Clean, maintainable, and well-documented code
➜ Performance-focused development
I do not just write code. I build systems that support long-term business growth.
If you are looking for someone who can architect your platform correctly from day one, lead your development team, improve system performance, deliver a production-ready MVP quickly, or manage your project while staying hands-on technically, let’s connect.
I am ready to bring structure, scalability, and senior-level execution to your project.
$18/hr
100%
Job Success
$2K+ earned
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As a Senior Blockchain Engineer with extensive hands-on experience in Solidity, Go, Rust, and Ride, I specialize in building secure, scalable, and innovative blockchain applications across major networks like Ethereum, Solana, Polygon, Binance Smart Chain, and Waves.
Over the past several years, I’ve successfully delivered end-to-end blockchain solutions including:
✅ Smart Contracts
✅ Custom Tokens & Crowdsales
✅ NFT Marketplaces & Utilities
✅ DEX/DeFi Protocols & Liquidity Pools
✅ Full-stack dApps
✅ Wallet Integrations (Custodial/Non-custodial)
✅ Blockchain Consulting & Audits
🔧 Core Technical Expertise:
🧠 Blockchain Development:
✅Solidity, Rust, Ride (Waves)
✅ EVM-compatible and Non-EVM chains
✅ DeFi protocols, staking systems, DAO implementations
✅ NFT minting, metadata, royalties, and marketplaces
✅ Wallet, exchange, and bridge integrations
✅ Hyperledger & Private Blockchains
✅ Crowdsales, ICO/IDO Platforms
💻 Smart Contract & DApp Expertise:
✅ Secure smart contract design and audit
✅ Frontend: React.js, Angular, Web3.js, Ethers.js
✅ Backend: Node.js, PHP (Laravel/Yii2/CakePHP)
✅ API integration: CoinPayments, MetaMask, Stripe, PayPal
📦 Infrastructure & DevOps:
✅ AWS, Ubuntu/Linux
✅ Redis, MongoDB, PostgreSQL, MySQL
✅ CI/CD, Docker, Git
🎯 What You Can Expect:
✅ Clean, maintainable code with best practices
✅ Security-focused development (reentrancy, overflow protection, etc.)
✅ Agile communication and reliable delivery
✅ Scalable architecture with ongoing support & upgrades
Associated with
Moogle Labs Private Limited
$500K+
earned