Hire the Best Smart Contracts Developers
in the United States
Bristol, Pennsylvania
I have been working in the space full time since 2018 and have gained a broad range of experiences. I have helped raise over a combined 3.5m for clients in 2021. My primary focus is now Solana where i spend a majority of my time teaching Blockchain Development on Solana. I really enjoy creating Tokenomics and writing Whitepapers. I also have creative direction/branding experience and a network of artists. I have done operations for teams as high as 50 people. 90% of my work comes from Twitter/Discord and past client referrals. I have also have obtained 4 clients legal regulatory compliance for their DAO in the USA. I value morals and ethics so any shady/suspicious requests will be ignored.(No flash loans, bots/scripts, arbitrage products) Services: Smart contract and deployment (-10 hours): Contract Deployment Post Project Consultation Candy Machine Deployment(Solana) Complete Token Project (20 hours): Website Whitepaper Contract Tokenomics Deployment Post Project Consultation Custom Smart Contract/NFT project (40+/- hours): Custom Contract with client specified logic. Token Frontends / Dashboards (React) DEX/Swap Clones NFT Minting Backend/Frontends/ IPFS Other Services: Regulation Consultations General Education Custom NFT Art (1k-10k Generated assets) Supported Standards: ERC-20 - Standard tokens ERC-998 - Composable Tokens ERC-721 - NFTs ERC-1155 - NFTs On-Chain NFTS Supported Networks: ETHEREUM SOLANA POLYGON/MATIC BSC AVALANCHE FANTOM
- Blockchain
- Blockchain Development
- Ethereum
- Smart Contract
- Solidity
- Project Management
- Initial Coin Offering
- Cryptocurrency
- web3.js
- React
- HTML
- JavaScript
- CSS
New York, New York
🚀 Building the future of Web3 and AI-powered innovation. I help startups, founders, and enterprises develop secure, scalable, and gas-optimized blockchain and AI solutions from smart contracts to AI-driven dApps, DeFi protocols, and cross-chain ecosystems. With 8+ years of experience in Solidity, Rust, and full-stack Web3 development, I am not just a coder, I’m a technical strategist who can turn your blockchain or AI concept into a production-ready product trusted by users and auditors alike. ✅ Core Blockchain & AI Services Smart Contract Development & Auditing -ERC20, ERC721, ERC1155, ERC404, BEP20, SPL token standards -Custom tokenomics: staking, vesting, whitelisting, royalties -Audit-ready code with gas optimization and security best practices AI + Web3 Integrations -On-chain AI data automation, AI agent integration, and model inference -Connecting machine learning APIs to decentralized apps -Smart contracts that interact with AI-powered oracles and analytics DeFi & Cross-Chain Protocols -DEX, lending, staking, and liquidity pool architecture -Cross-chain bridge development (LayerZero, Wormhole) -Yield farming and tokenomics systems Full-Stack dApp Development -Frontend: React, Next.js, TypeScript, TailwindCSS -Backend: Node.js, Python, Rust, Express.js -Web3 libraries: Ethers.js, Web3.js, Solana Web3.js Security & Testing -Unit, fuzz, and integration testing (Foundry, Hardhat, Anchor) -Vulnerability mitigation: reentrancy, flash loan, integer overflow -Audit preparation and refactoring for gas efficiency 🔍 Popular Project Types >Cross-chain NFT marketplaces >AI-driven smart contracts & analytics dashboards >DAO governance and voting systems >DeFi yield platforms & crowdfunding dApps >zkEVM and L2 integrations >Web3 wallets and automation scripts 🧠 Tech Stack *Languages: Solidity, Rust, TypeScript, JavaScript, Python *Frameworks: Hardhat, Foundry, Anchor, Brownie, Next.js *Chains: Ethereum, Solana, Polygon, BSC, Avalanche, Arbitrum, zkSync *Infra: IPFS, PostgreSQL, MongoDB 💬 Client Feedback ⭐ “Delivered an audit-ready smart contract with zero vulnerabilities.” ⭐ “Optimized our DeFi protocol, reducing gas costs by 40%.” ⭐ “Flawless communication, felt like having a CTO on the team.” 📞 Let’s Build the Future Whether you’re creating a Web3 DeFi app, AI-powered blockchain system, or NFT marketplace, I’ll help you design, develop and deploy with confidence. 📩 Click “Invite to Job” or message me, let’s bring your blockchain + AI vision to life
- Smart Contract Development
- Blockchain
- Blockchain Development
- Ethereum
- Solidity
- DApps
- Blockchain, NFT & Cryptocurrency
- Web3
- Crypto Wallet Development
- NFT Marketplace
- Artificial Intelligence
- Machine Learning
- Full-Stack Development
- DevOps
- NFT Minting
Fredericksburg, Virginia
As a forward-thinking agency, we specialize in delivering cutting-edge Web 3 solutions to businesses, driving innovation across various industries. Our expertise and services are tailored to meet the dynamic needs of our clients, ensuring their projects stand out in the digital landscape. 🔥 Our Services 🎮 Meta-Fi Integration: Revolutionize your gaming experience with our advanced NFT trading solutions, enhancing interoperability and engagement. 💱 De-Fi in the Metaverse: Unleash the potential of digital assets with our bespoke cryptocurrency wallets and exchanges. 🕹️ GameFi – Next-Gen Web3 Gaming: Enter a new era of gaming with our integrated ecosystem that combines blockchain, DeFi, NFTs, and in-game currencies. 💻 Bespoke Web3 Development: Customized Web3 solutions for businesses of all sizes, leveraging blockchain, NFTs, and cryptography. 🔗 Custom Blockchain Solutions: Tailor-made blockchain solutions for startups and enterprises, focusing on automation and streamlined operations. 📜 Smart Contract Development: Specialized in Solidity and Rust, we deliver versatile smart contracts for applications like De-Fi, DEX, DApp, and NFTs. 🎨 NFT Tokenization Services: Transforming collectibles into valuable digital assets with our innovative NFT development. 🛒 NFT Marketplace Creation: Comprehensive NFT marketplace development, blending smart contract protocols and robust programming. 🔄 Decentralized Exchange Development: Secure, scalable, and custom-built DEX solutions for businesses aiming for peak performance. 🔒 Digital & Crypto Wallet Development: Streamlined and secure wallet development services tailored for global digital asset management. 🌍 Strategic Web3 & Blockchain Consulting: Propel your growth with our strategic consultancy in blockchain and Web3 technologies. ✅ My proficiency spans NodeJS and .NET for robust back-end development, while Django powers seamless integration and powerful functionalities. On the front-end, I excel in ReactJS and Angular, creating captivating user interfaces. ✅ As a Lead Full-Stack Developer, I've successfully managed teams, ensuring timely project deliveries and streamlined workflows. My collaborative approach ensures clear communication and a precise understanding of client needs. ✅ I've contributed to notable projects, demonstrating my commitment to innovation and excellence in delivering tailored solutions using NodeJS, .NET, Django, ReactJS, and Angular. ✅ My expertise extends to databases such as PostgreSQL, MySQL, and MongoDB, ensuring optimized data management. Additionally, I am proficient in mobile application development using React Native. ✅ 𝙎𝙤𝙡𝙪𝙩𝙞𝙤𝙣 𝘼𝙧𝙘𝙝𝙞𝙩𝙚𝙘𝙩 | 𝘿𝙚𝙫𝙊𝙥𝙨 | 𝘼𝙒𝙎 | 𝘼𝙯𝙪𝙧𝙚 | 𝙏𝙚𝙧𝙧𝙖𝙛𝙤𝙧𝙢 | 𝙆𝙪𝙗𝙚𝙧𝙣𝙚𝙩𝙚𝙨 | 𝙂𝘾𝙋: Empower your organization with scalable, resilient, and secure cloud-native solutions crafted by an experienced Solution Architect and DevOps specialist. With expertise spanning AWS, Azure, Google Cloud Platform (GCP), Terraform, Kubernetes, and more, I provide end-to-end services to optimize your cloud infrastructure and drive digital transformation. ✨ Our Track Record Working with esteemed clients like Vulcan Forged, DadaVault, Private Jet Pyjama Party, and Elysium. Celebrated as top 100 metaverse innovators and holding CMMI level 2, V.02 certification. Recognized by Good Firms, Selected Firms, and IT Firms as a leader in blockchain development. Members of the Blockchain Game Alliance and the Metaverse Standards Forum, we remain at the forefront of industry advancements. 🚀 Ready to Innovate? Embark on a journey to transform your blockchain dreams into reality with us. Connect on Upwork and let’s craft the future of technology together! 🌟
- Blockchain Development
- Ethereum
- Smart Contract
- Solidity
- Blockchain Architecture
- Cryptocurrency
- API Development
- React
- ASP.NET
- Node.js
- Binance Coin
- Back-End Development
- Full-Stack Development
- Django
- DevOps
Garland, Texas
👋 Hi, I'm a Full Stack Blockchain Developer | Web3 Engineer | NFT & DeFi Specialist I help startups and enterprises build and scale their ideas into real-world blockchain applications. From early-stage consulting to full product delivery, I partner with businesses to integrate blockchain, NFTs, smart contracts, and decentralized systems into their models, securely and efficiently. With years of hands-on experience, I have developed and led full-cycle blockchain solutions, including NFT marketplaces, DeFi protocols, custom smart contracts, and token launches on Ethereum, Solana, and other major networks. I don't just write code, I offer strategic insight to help you align your tech stack with your business goals. 🔧 What I Do ✅ Custom Blockchain Development – Build solutions tailored to your needs, from the ground up ✅ Smart Contract Development – Design, audit, and deploy secure contracts (ERC-20, ERC-721, ERC-1155) ✅ NFT Marketplace Development – Launch NFT platforms for digital art, real estate, collectibles, and more ✅ **DeFi Protocols** – Develop and integrate staking, farming, token swaps, liquidity pools ✅ **Web3 dApp Development** – User-friendly decentralized applications powered by React, Next.js, and Web3.js ✅ **Crypto Wallet & Exchange Integration** – Secure wallets and seamless crypto transactions ✅ **Blockchain Consulting** – Translate your business idea into a blockchain-ready architecture ✅ **POC/MVP Creation** – Get investor-ready with lean, functional Proof of Concepts ✅ **Private & Permissioned Blockchain Solutions** – Built on Hyperledger, Substrate, or Multichain ✅ **Ongoing Maintenance & Support** – Keep your platforms secure, fast, and up-to-date 💻 Tech Stack I Work With **Blockchain / Smart Contracts** 🔹 Solidity, Rust, Golang 🔹 Ethereum, Solana, Polygon, Binance Smart Chain, Substrate 🔹 ERC-20, ERC-721, ERC-1155 standards 🔹 Truffle, Hardhat, Remix, OpenZeppelin 🔹 Web3.js, Ethers.js, 0x.js 🔹 Metaplex, Anchor, Phantom Wallet Integration 🔹 IPFS, Moralis, OpenSea API 🔹 Crypto Bot and AI Blockchain Tools **Backend Development** 🔸 Node.js, Nest.js, Express.js 🔸 Python, Golang 🔸 PostgreSQL, MongoDB, MySQL 🔸 Firebase, AWS, Azure 🔸 CI/CD: Git, Jenkins, Docker, GitHub Actions **Frontend Development** 🔸 React.js, Next.js, Gatsby, Vue.js 🔸 Tailwind CSS, Material UI 🔸 TypeScript, JavaScript 🧠 Why Clients Work With Me * I take time to **understand your business model**, not just your tech stack * I deliver **clean, scalable, and maintainable code** * I offer **end-to-end solutions**—from concept to post-launch support * I provide **timely communication**, flexibility with time zones, and full transparency * I’ve built **long-term relationships** with clients by being consistent, proactive, and accountable ✅ Let’s Build the Future of Web3 Whether you're launching a **DeFi project**, building an **NFT platform**, or exploring **custom blockchain use-cases**, I can help you build secure, scalable, and user-friendly solutions that deliver real value. 📩 Let’s connect and turn your blockchain vision into reality. 🔍 Keywords (for visibility): blockchain developer, smart contract developer, solidity developer, web3 developer, NFT developer, ethereum developer, solana developer, rust blockchain developer, erc20 developer, erc721 developer, erc1155 developer, defi developer, nft marketplace, crypto wallet developer, smart contracts, full stack blockchain developer, web 3.0 development, ethereum smart contracts, custom blockchain solutions, decentralized app development, dApps, truffle, hardhat, openzeppelin, metaplex, opensea api integration, blockchain consulting, ico development, crypto exchange developer, token development, blockchain maintenance, decentralized finance, layer 1 blockchain, AI crypto bot, blockchain integration
- Blockchain Development
- Blockchain, NFT & Cryptocurrency
- Blockchain Architecture
- React
- Node.js
- PostgreSQL
- Next.js
- MongoDB
- Web3
- Algorithm Development
- Quantitative Analysis
- Solana
- AI Trading
- Cryptocurrency Trading
American Canyon, California
Hello! I'm Alex, a full stack blockchain developer with expertise in smart contract development, bot creation, and front-end integration. Here are some of the skills I bring to the table: Bot Development I’ve built custom bots to monitor DeFi positions, track NFT ownership, and automate transactions across EVM-compatible chains. Smart Contract Development I’ve written, tested, and deployed smart contracts for DeFi protocols, NFT projects, and custom dApps. NFT Projects I've successfully launched multiple NFT projects, handling everything from metadata creation to deployment. Front-End Integration I am experienced with ethers/web3.js, and can seamlessly connect smart contracts with front-ends. Technical Consulting I’ve helped dev teams troubleshoot complex issues and keep projects moving efficiently. My goal is to understand your problem and work with you to deliver a clean, effective solution. Looking forward to working together, Alex
- Blockchain
- Ethereum
- Smart Contract
- Solidity
- Cryptocurrency
- Python
- web3.js
- iOS Development
- Swift
- Scripting
- React
- Flask
Las Vegas, Nevada
My focus is on creating robust, future-proof systems with clear logging, structured outputs, and minimal dependencies, ensuring every project is transparent, reliable, and built for long-term success.
- Blockchain
- Cryptocurrency
- API Integration
- Node.js
- MongoDB
- Solana
- web3.js
- Data Analysis
- Automation
- Swift
- ExpressJS
- Next.js
- Docker
- Ethers.js
- GIS
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