Hire the Best web3.js Professionals

Want to work with an experienced Blockchain developer who can bring your smart contract, decentralized application (dApp) vision to life? Are you looking for a Solidity or Rust developer to develop "Gas-Optimized" smart contracts? Whether you're looking to create ERC20 or SPL tokens, ERC721, ERC1155, or NFTs with custom features, concerned about vulnerabilities and exploits in your high-value contracts, need to write tests for contracts, or need a script to interact with leading DEX protocols—I've got you covered. 🖐 Some of my previous clients' quotes about me: ✔️ "...Excellent technical skills and consistently good communication... Completed the project in a timely fashion, exceeding our original deadline." ✔️ "His work was phenomenal...made sure I understood every step along the way... ✔️ "..took this project on as if it was his own... Great professional skills, always there to answer questions and suggest the best solutions." ✔️ "...Every facet of his work was impressive. WOW!" ✔️ "... goes above and beyond. Md's professionalism and expertise in blockchain are unmatched.." ✔️ "... communication is excellent, delivery is fast, and his knowledge of smart contracts is impressive." With expertise in EVM-compatible chains (like Ethereum, BSC) and Solana, I specialize in delivering high-performance, gas-optimized smart contracts and dApps tailored to your specific requirements. I help my clients build secure and highly resilient smart contracts, minimizing vulnerabilities and ensuring your code is fortified against exploits. I might be the perfect fit if you're thinking of any of these: ✅ "I need the BEST developer who's as passionate about my success as his own." ✅ "I want someone who will walk me through every step of smart contract interaction." ✅ "Gas fees are too high! My smart contract needs to be lightning-fast and cost-efficient." ✅ "I know blockchain, but I need a professional to make my smart contracts 100% secure." ✅ "I’m not an Ethereum or Solana expert, and I don’t have time to mess around with dApps." ✅ "Our last dApp was a disaster—I can’t afford to let that happen again." ✅ "I need an EVM-compatible blockchain or Solana expert to cover all my bases for cross-chain or multi-chain applications." Working with me, you will: 💎 Gain access to a developer skilled in Python, JavaScript, TypeScript, Rust, Solidity, Brownie, Hardhat, NextJS, Foundry, and Anchor. 💎Eliminate vulnerabilities and reduce gas fees during both deployment and interactions. 💎 Maximize your DApp's security with continuous follow-ups for improvements. 💎 Save time and resources—you won’t need to hire separate back-end, front-end, Rust, or Solidity developers because I handle it all as a full-stack developer. 💎 Receive custom scripts to swap, add, or remove liquidity, lend, deposit, borrow, withdraw, and interact across top dApp protocols. 💎 Optimize for multi-chain functionality—Whether you need to bridge Ethereum, BSC, or Solana, I can create solutions that integrate seamlessly across multiple networks. 🖐 My Skills & Expertise in Blockchain: ☑️Solidity Development for EVM-compatible smart contracts ☑️Rust Development for Solana Blockchain ☑️Experience with Chainlink, various ERC standards, and OpenZeppelin ☑️Token development(ERC20/BEP20/SPL) with features like Mintable, Burnable, Reflections, TxFee, Whitelist/Blacklist, and IDO/ICO for tokens. ☑️NFTs (ERC721, ERC1155, ERC404, etc) with Whitelist, Royalties, Presale, Public Sale, Dutch Auctions, IPFS Hosting, and Dynamic NFTs ☑️Full-stack Blockchain Developer with expertise in Solidity, Python (Brownie), JavaScript (Hardhat), Typescript, Rust(Anchor), NextJS, and Foundry. ☑️Script/Program Development for deploying/interacting with smart contracts and protocols like Aave, Uniswap, Raydium, and PancakeSwap. Why Work With Me: 💎Extensive Experience: I've designed and built hundreds of smart contracts from scratch, creating robust back-end scripts for deployment. 💎Expert Problem Solver: Proficient in designing projects from the ground up, solving complex problems, and rapid iterative prototyping. 💎Gas Optimization Strategies: I use professional strategies to optimize smart contracts for minimal gas fees and thoroughly test them to identify and prevent potential exploits. My Background in Numbers: ✔️ Over 3 years of experience with Blockchain technology. ✔️ Developed numerous DApps and scripts for protocols and tokens, including ERC20, BEP20, SPL, ERC721, and ERC1155. ✔️ Worked on several growing DApp projects, such as Crowdfunding platforms, Airdrop systems, DEXs, insurance, ICO, IDO, Tokens, Lottery, and NFT marketplaces. ✔️ Created a variety of smart contracts. ✔️ Wrote extensive test scripts for smart contracts using Foundry, Hardhat, and Anchor. Sound Like a Fit? Next Steps: Click the green "Invite to Job" button in the top right-hand corner or send me a message, and let’s schedule a call to discuss your project! Otherwise, feel free to book a consultation!

With 8+ years of experience as a Full Stack Developer, I specialise in creating dynamic, high-performance web applications. My expertise spans both front-end and back-end development, as well as blockchain technologies. Whether you need a seamless, user-friendly interface or a robust, scalable backend, I deliver solutions that exceed expectations. I have a proven track record of success, demonstrated by my top-rated plus Upwork profile and 100+ completed projects. My skills include: - Front-end: React, Vue.js, HTML5, CSS3, JavaScript/TypeScript - Back-end: Node.js, Express.js, RESTful APIs - Blockchain: Smart contracts, Solidity, Ethereum, Web3.js - Database: MySQL, PostgreSQL, MongoDB - Version Control: Git/GitHub Let’s discuss how I can help bring your vision to life and drive your project to success!

Dear my Precious Client, My name is Nhan Nguyen. I'm a Senior Developer from Soin Media, a premier software outsourcing company dedicated to connecting global enterprises with elite engineering talent. My Job Success Score is 100%. And I'm one of Top Rated Plus freelancers on Upwork. I started my freelancing career in 2009. I've been working on Upwork since 2010. With 128 completed jobs, 2681 paid hours, and more than 18 year experience, I will deliver your website, web application, and mobile application smoothly and satisfactorily. You will be satisfied with the final products, and we will have a comfortable journey together from the beginning to the ending of the project. You can check my working history for previous feedback from my clients. Collaborative, committed to quality, clear communicator, reliable, accountable for outcomes, solution oriented, professional, detail oriented are what clients reviewed me. NodeJS, React, React Native, C#, Kotlin, Swift, Solidity, Rust, AI are my main tools to build your website, web application, and mobile application. We can start our working partnership at 1 of these 3 points: 1. A description of what you want me build for you. I will compose a proposal and a development plan based on your project description. 2. A UI design (in Figma, Canva, Photoshop,...) which has several screens of your website, web application, or mobile application. I will design the other screens for you. 3. An existing website, web application, or mobile application which was abandoned by your previous developer(s). I will pick up what we have and continue the development until we launch your product(s) to the market. Feel free to ask me any question. Even you won't hire me, I'm still happy to advise you and help you to get your project warm-up. Best regards, Nhan Nguyen.

Wanna see yourself on below list of clients I helped to earn few millions? Send me contract offer today! After working with me, clients usually get a feeling there is nothing I can’t do, and start throwing at me tasks requiring multiple skills I don’t have (which I pretty much always deliver) Indeed, “I can do all things through Christ which strengtheneth me.” (Philippians 4:13) but for most years I was programming, I was gaining experience with Javascript (React.js/Next.js/Node.js) and PHP (Symfony/Laravel/Wordpress) Last year I’m mostly working on Blockchain projects forking/fixing/auditing and integrating smart contracts into web applications frontend and backend. I was never smartest / most experienced / most educated guy around, so for 28 years I’ve spent programming (18 as primary income) I’ve been cultivating persistence, performance and love for challenges, which allows me to consistently deliver complex tasks, others are scared to even try or give up too soon. Of course, success is always an effort of entire team, but it wouldn't be too much of an exaggeration to say that, with God’s help I was the guy who made it possible - For Mobillogix to get MVP developed and shown to potential investors in about a month, get $4.5 million in a seed round (public data), and partner with companies like Samsung and AT&T (Fortune TOP20 at 2017) - For FindCashBuyersNow to get an unfair technological advantage, get US real estate market domination and receive gazillion (not authorised to disclose actual figures) USD for capital management - For Logan Paul to raise $3.5M (public data) after selling his Originals NFT collection - For Amnext to acquire above $0.5M market cap (public data) few days after the launching their DeFi - For BoomBoomNaturals to prepare their Shopify store to be ready for the date of being shown at Shark Tank episode ( youtu.be/K8cR6nn2_s4 ) and receive gazillion (not authorised to disclose actual figures) USD in sales Can’t list here all projects, but here is feedback I got from 2 of TOP100 Upwork clients (those who spent on Upwork more than $1M) after working with them for a few years: - #1 developer on Upwork. Having spent close to $200,000 with him on several projects, I am extremely happy and satisfied with his work... He is the kind of developer who takes on challenges and projects no one else can solve and with deadlines that are extremely difficult to achieve. He is worth every penny and more because he gets the job done every single time without any excuses or delays. Anyone who has the opportunity to work with Dmitry should consider themselves lucky as in all my years in Upwork, I haven't found someone as talented, patient and hard working as him as he never complains about how complex a job is, how tight the deadlines are or the fact that majority of the time he is solving the problems/bugs caused by other developers halfway towards the finish line of the project... - ... one of the best developers you can find, he is extremely smart, highly skilled and many web technologies, quick learner, friendly, business focused and result focused. I highly recommend Dmitry to anyone looking to hire someone that can get the job done If that wasn't enough, to save you from scrolling through hundreds of jobs, I've picked few more: - in 7 years of continuously using freelancer websites this experience stands out as being exemplary ... most professional manner possible. 6 stars - I am rarely impressed, but I was impressed! Senior Google/Facebook level of expertise truly unbelievable. - I don't know how Dmitry managers to do what he does, but he is far and above the most communicative, qualified and efficient developer I have worked with here - Wow how you do that so easily, GENIUS! - Dmitry truly is brilliant at programming. Many people say they are rockstar programmers but he truly is a rockstar - Truly a PHP ninja and a rock star developer - The fastest and more competent PHP developer I found on oDesk! He's really the "fastest gun in the west" - It is not a human! - This guy is a wizard - Dmitri is truly as talented of a developer as everything (including himself) says he is - I would pay a much higher hourly rate for his services. He is faster than any other contractor I've worked with here and he gets the job done correctly - This guy is awesome. Period

Full stack developer building scalable web apps, blockchain solutions, and AI-powered platforms. Delivered crypto wallets, SaaS products, and Web3 applications using React, Node.js, and Solidity. ══════════════════════════════════ WHAT I BUILD ══════════════════════════════════ → Web Applications & SaaS Platforms Dashboards, admin panels, subscription systems, user portals → Blockchain & Web3 Solutions Crypto wallets, smart contracts, dApp frontends, token integrations → AI-Powered Features Chatbots, workflow automation, OpenAI integrations, intelligent systems → APIs & Backend Systems REST, GraphQL, secure authentication, scalable architecture ══════════════════════════════════ TECH STACK ══════════════════════════════════ Frontend: React • Next.js • TypeScript • Tailwind CSS Backend: Node.js • Express • NestJS • GraphQL • REST API Blockchain: Solidity • Web3.js • Ethers.js • Smart Contracts Database: PostgreSQL • MongoDB • Redis • Firebase AI: OpenAI API • LangChain • Python ══════════════════════════════════ WHY HIRE ME ══════════════════════════════════ ✓ Shipped crypto wallets handling real transactions ✓ Built SaaS platforms serving thousands of users ✓ Clean, maintainable, well-documented code ✓ Clear communication and on-time delivery ══════════════════════════════════ IDEAL PROJECTS ══════════════════════════════════ - SaaS & web application development - Blockchain & crypto wallet projects - AI feature integration - API development - Dashboard & admin panels - Web3 dApp frontends ══════════════════════════════════ Message me with your project details. I respond within 24 hours.

Most developers write code. I build products. I work with founders and startups to design and ship full-stack web applications from early MVP to production-ready systems. I specialize in AI-powered apps, SaaS platforms, and blockchain integrations, handling everything from backend architecture to frontend interfaces so you get one person who owns the whole thing. I've shipped apps with 1M+ downloads, built AI-powered SaaS tools, crypto wallets, and Web3 platforms all the way to production. No handoffs, no coordination overhead, just clean systems that work. If you have an idea and need someone who can run with it end to end, send me a message and let's figure out the right approach together. 𝗣𝗲𝗼𝗽𝗹𝗲 𝘂𝘀𝗲 𝘁𝗵𝗲𝘀𝗲 𝗸𝗲𝘆𝘄𝗼𝗿𝗱𝘀 𝘁𝗼 𝗳𝗶𝗻𝗱 𝗺𝗲 ───────────────────────────── React | Next.js | Node.js | NestJS | Flutter | React Native | Solidity | Python | FastAPI | MongoDB | Firebase | PostgreSQL | REST API | GraphQL | WebSockets | OpenAI API | LangChain | RAG Pipeline | XRPL | Smart Contracts | ERC-20 | ERC-721 | ERC-4626 | WalletConnect | Web3.js | Ethers.js ───────────────────────────── SaaS | DeFi | HealthTech | FinTech | EdTech | PropTech | AgriTech | Web3 | NFT Marketplace | RWA Tokenization | Crypto Wallet | DEX | DAO Governance | Real Estate Tech | AI Startup ───────────────────────────── MVP Development | Full-Stack Development | API Development | Smart Contract Development | Mobile App Development | AI Integration | LLM Integration | Blockchain Development | Token Launch | Product Architecture | SaaS Build | End-to-End Delivery ───────────────────────────── AI | Web3 | Blockchain | LLM | GPT | Machine Learning | Automation | DeFi | NFT | Tokenization | OpenAI | Claude API | Agentic AI | No-Code AI | Prompt Engineering