Hire the Best Blockchain Developers in California

I've hired engineers on Upwork and know how hard it is to know if someone's credible. I post my thoughts, code, and projects on X, where I have over 5k followers who are mostly software engineers in the SF bay area. Find me on X: georgepickett I am a software engineer based in San Francisco obsessed with AI. I'm a core maintainer of OpenClaw, I contribute to lots of open source projects, and run in-person meetups in SF teaching engineers best practices for agentic engineering. I build AI agents, automation systems, and developer tools that ship. My recent open source work includes OpenClaw Studio, a TypeScript and Next.js dashboard for operating OpenClaw agents with 2,000+ GitHub stars, and lot of other tools I've built for myself and shared with the world. I can help with AI strategy, building agents, chatbots, workflow automation, OpenAI and Claude integrations, Next.js apps, Python tooling, CLI workflows, and MVPs that need both product judgment and solid engineering.

I’m a professional Blockchain developer with expertise in designing and developing smart contracts and Web3 applications on EVM and Solana. I have hands-on experience building DApps, DEXs, and DeXScreeners and have helped clients successfully crypto projects and NFTs on various chains. Want something Surprise in crypto? Let’s talk.

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

Hey!👋 I am an Experienced Full-Stack Web & Desktop Architect with 1️⃣5️⃣+ years of track record, offering comprehensive solutions for websites and desktop applications. Proficient in both frontend and backend technologies, ensuring seamless, efficient, and scalable solutions. 🗝Services: - Website Development - E-Commerce Development - Responsive Web Design - UI/UX Design - Desktop Application Development - Web Application Development - Website Maintenance and Support - Landing Page Design - Website Redesign - Single Page Application (SPA) Development 💥Skills: - HTML, - CSS, - JavaScript, - React, - Nuxt.js, - Vue.js, - TypeScript, - Electron.js, - Next.js, - jQuery, - Figma, - Adobe Illustrator, - Sketch, - Adobe Photoshop, - Framer, - Testing and Debugging Utilizing modern frameworks and technologies to deliver high-quality, user-friendly, and secure digital products that meet your specific business needs. 📲 I am committed to delivering high-quality solutions. So, contact me to start your project ASAP! Hashtags: #WebDevelopment #WebDesign #UIDesign #UXDesign #ResponsiveDesign #APIIntegration #CRMSystems #ERPSystems #WebsiteDevelopment #WebApplicationDevelopment #FrontendDevelopment #BackendDevelopment #JavaScriptDevelopment #VueJS #ReactJS #NodeJS #PHP #Python #DatabaseManagement

Looking for a seasoned Blockchain & MEV trading bot developer to turn your smart contract and decentralized application (dApp) ideas into reality? In need of a developer proficient in Solidity or Rust to craft 'Gas-Optimized' smart contracts? Whether you aim to create ERC20 or SPL tokens, ERC721, ERC1155, or ERC404 NFTs with unique functionalities, or are wary of vulnerabilities in high-value contracts and need testing or scripts to interact with top DEX protocols—I'm here to help. With a strong expertise in EVM-compatible chains like Ethereum and Binance Smart Chain as well as Solana, I focus on delivering efficient, gas-optimized smart contracts and tailor-made dApps. My goal is to assist clients in building secure, robust smart contracts that minimize risks and prevent exploits. Consider collaborating with me if you're considering any of the following: ✅ "My bot is not profitable—I need a developer to optimize it for MEV trading." ✅ "I need a Solana Copy Trader bot to automate my trades." ✅ "I want to boost my token volume with maker bot or volume bots" ✅ "I need a top-tier developer who's invested in my success." ✅ "I want guidance through every part of smart contract interaction." ✅ "Gas fees are high! My smart contract needs to be efficient and fast." ✅ "While I'm knowledgeable about blockchain, I need a pro to ensure my smart contracts are impeccable." ✅ "I'm not an expert on Ethereum or Solana and can't afford to make mistakes with dApps." ✅ "Our earlier dApp didn't work out—I can't let that happen again." ✅ "I require an expert on EVM-compatible blockchains or Solana for cross-chain solutions." Feedback from past clients includes: ✔️ "...outstanding technical skills and great communication... Completed the project ahead of schedule." ✔️ "Exceptional work... ensured clarity at every step." ✔️ "...approached the project as his own... highly professional and always ready with optimal solutions." ✔️ "...his comprehensive work was impressive!" ✔️ "...exceeds expectations. His professionalism and grasp of blockchain are exceptional." ✔️ "...great communication, rapid delivery, and extensive knowledge of smart contracts." Engaging with me means: 💎 Access to a developer adept in Python, JavaScript, TypeScript, Rust, Solidity, Brownie, Hardhat, NextJS, Foundry, and Anchor. 💎 Eliminating vulnerabilities and reducing gas fees during deployment and interactions. 💎 Enhancing your DApp’s security with ongoing improvements. 💎 Saving time and resources—you don't need separate back-end, front-end, Rust, or Solidity developers; I provide all these services as a full-stack developer. 💎 Receiving tailored scripts for liquidity operations, lending, borrowing, and more across leading dApp protocols. 💎 Optimizing for multi-chain features—whether bridging Ethereum, BSC, or Solana, I can develop solutions integrating seamlessly across multiple networks. My Blockchain Skills & Expertise: ☑️ Solidity development for EVM-compatible smart contracts. ☑️ Rust development for the Solana Blockchain. ☑️ Experience with Chainlink and various ERC standards using OpenZeppelin. ☑️ Token development (ERC20/BEP20/SPL) with attributes like Mintable, Burnable, Reflections, TxFee, Whitelisting/Blacklisting, and IDO/ICO for tokens. ☑️ NFTs (ERC721, ERC1155, ERC404, etc) with features like Whitelisting, Royalties, Presale, Public Sale, Dutch Auctions, IPFS Hosting, and Dynamic NFTs. ☑️ Full-stack Blockchain Developer expertise in Solidity, Python (Brownie), JavaScript (Hardhat), Typescript, Rust (Anchor), NextJS, and Foundry. ☑️ Program and script development for deploying/interacting with smart contracts and protocols like Aave, Uniswap, Raydium, and PancakeSwap. Why Choose Me: 💎 Extensive Experience: Crafted hundreds of smart contracts from scratch, developing resilient back-end scripts for deployment. 💎 Problem Solving Expert: Skilled at developing projects from the ground up, tackling complex issues, and iterative prototyping. 💎 Gas Optimization Techniques: Employs advanced strategies for minimizing gas costs and thoroughly testing to identify and mitigate potential exploits. Background in Numbers: ✔️ Over 3 years of experience with Blockchain technology. ✔️ Created numerous DApps and scripts for tokens and protocols like ERC20, BEP20, SPL, ERC721, and ERC1155. ✔️ Contributed to several expanding DApp projects including Crowdfunding platforms, Airdropping systems, DEXs, insurance, ICO, IDO, Tokens, Lottery, and NFT marketplaces. ✔️ Developed a range of smart contracts. ✔️ Authored comprehensive test scripts for smart contracts using Foundry, Hardhat, and Anchor. Interested in working together? Here's what to do next: Hit the green "Invite to Job" button at the top right or send me a message so we can schedule a chat about your project! Alternatively, feel free to book a consultation.

Let’s build something impactful—together. ✅Full Stack Web Development: @ Frontend: React.js, Angular, Vue.js, HTML5, CSS3, JavaScript, TypeScript, React, Vue, ESLint, Prettier, Storybook, Vite/Webpack/Babel @ Backend: Node.js, Python, Rub y(Rails), Laravel, Golang, .NET, Spring Boot, Express.js, NestJS, Django/Flask/FastAPI, @ Databases: MongoDB, MySQL, PostgreSQL, Redis, Cassandra/DynamoDB @ API Development & Integration: RESTful APIs, GraphQL, gRPC, WebSockets @ Authentication & Security: OAuth2, JWT, SSL/TLS, RBAC/ACL, CSRF/XSS ✅AI/ML | Python, Data Engineering @Python (Pandas, NumPy, Scikit-learn, OpenAI API) @LLM integration (ChatGPT, LangChain, RAG pipelines) @NLP & text classification, embeddings @FastAPI / Flask for serving ML models @Firebase, Supabase, Neo4j for AI-powered apps