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Hey 👋 I am a Blockchain and Full-Stack Developer with 5+ years of experience building Web3 applications, DeFi protocols, NFT marketplaces, smart contracts, and scalable backend systems. I help startups and businesses turn ideas into secure, production-ready blockchain and web applications, from smart contracts to full dApps and mobile apps. If you're looking for a Solidity developer, Web3 developer, or full-stack developer who understands both blockchain architecture and real-world product development, I can help. 🔗 Blockchain Development (Solidity | Rust | Web3) I design, develop, and deploy secure smart contracts and decentralized applications across multiple chains: Ethereum | BSC | Polygon | Avalanche | Base | Optimism | Solana Experience with: ERC-20, ERC-721, ERC-1155 token development DeFi protocols (staking, farming, vaults, liquidity pools) NFT marketplaces & minting platforms Generative NFT collections Smart contract auditing mindset (security + gas optimization) 🛠 Full-Stack Development (Node.js | Spring Boot | APIs) I build scalable backend systems and REST APIs using: Node.js (Express / NestJS) Java Spring Boot (enterprise-grade systems) REST & GraphQL APIs Microservices architecture (where needed) Databases: PostgreSQL MySQL MongoDB Firebase 🔌 Web3 / dApp Integration I create seamless blockchain user experiences using: Ethers.js / Web3.js Smart contract integration Wallet integrations: MetaMask, WalletConnect, Coinbase Wallet, Phantom, Unisat, Xverse Focus: simple UX for complex blockchain systems 📱 Mobile App Development (React Native / Expo) Cross-platform mobile apps for iOS and Android using a single codebase. Built apps include: Portfolio project: SPORTAINMENT App for both Android and IOS Web3 / crypto apps E-commerce apps Dashboard & utility apps Performance-focused, scalable, and production-ready. 🎨 Frontend Development React.js (Material UI / Chakra UI) Vue.js (Quasar Framework) Focus on clean UI, responsive design, and user-friendly interfaces. ☁️ Cloud & DevOps (AWS / GCP) Production deployment and infrastructure setup using: AWS (EC2, S3, Lambda, RDS, CloudFront, API Gateway) Google Cloud Platform (storage & deployment) I can set up full scalable architecture from backend to deployment pipelines. 🚀 Why clients hire me Strong experience in DeFi, NFT, and Web3 ecosystems Full-stack capability (frontend + backend + blockchain) Production-ready mindset (security, scalability, performance) Clear communication and long-term collaboration I don’t just deliver code, I help build real, usable, scalable products. If you're looking for a Web3 developer, Solidity developer, or full-stack blockchain engineer, feel free to reach out. I’d be happy to discuss your project.

Blockchain products succeed when they're secure, scalable, and easy to use. I help startups and businesses build production-ready crypto wallets, smart contracts, Web3 applications, and mobile apps that users trust. 4+ Years Experience | 23+ Projects Delivered My expertise includes: Blockchain Development Solidity & Rust Smart Contracts ERC-20, BEP-20 & SPL Tokens DeFi, Staking & dApps NFT Platforms WalletConnect & MetaMask Integration Crypto Wallet Development Multi-Chain Wallets Non-Custodial Wallets Bitcoin, Ethereum & Solana Wallets Secure Transaction Signing Token Swaps & Wallet Recovery Mobile & Backend React Native (Android & iOS) Node.js & Express MongoDB & Firebase REST APIs & WebSockets App Store & Play Store Deployment Featured Projects Noottools Multi-Chain Wallet Built a secure Solana wallet with multi-chain support, wallet recovery, and transaction signing. Web3 Wallet & Chat App Developed a decentralized wallet with secure messaging and blockchain transactions. DexCrypto Wallet & Exchange Built a crypto exchange platform with KYC, wallet management, and secure backend APIs. MyRay Wallet Developed a non-custodial multi-chain wallet with Web3 integration and secure key management. Tech Stack Blockchain: Solidity • Rust • Anchor • Hardhat • Ethers.js • Web3.js Frontend: React • Next.js • React Native • TypeScript Backend: Node.js • Express • MongoDB • Firebase Why Work With Me? ✔ Crypto Wallet Specialist ✔ Web3 & Blockchain Expert ✔ Secure Smart Contracts ✔ End-to-End Development ✔ Scalable Backend Architecture

20+ smart contracts deployed on Ethereum, BSC, and Polygon. Zero failed audits. 100% client satisfaction. I build production-ready Web3 products — DeFi staking platforms, token launches (ERC-20/SPL), NFT ecosystems, and full dApp frontends using Next.js + Solidity. Not just smart contracts — complete, deployed, working products. I have expertise in building scalable web apps using React.js, Next.js, Node.js, and integrating them with blockchain solutions on Ethereum, BSC, Polygon, and Solana.I build production-ready Web3 apps: smart contracts, NFT minting, DeFi dashboards, wallet integrations (MetaMask, WalletConnect). 𝐖𝐇𝐀𝐓 𝐈 𝐁𝐔𝐈𝐋𝐃: ✔ DeFi Platforms (staking, yield, liquidity) ✔ Token Launches (ERC-20, BEP-20, SPL — presale to DEX listing) ✔ NFT Collections + Minting Sites + Marketplace Integration ✔ Full Stack dApps (Next.js + Ethers.js + Solidity) ✔ Wallet Integration (MetaMask, WalletConnect, Phantom) ✔ Cross-chain Solutions (ETH, BSC, Polygon, Solana) ✔ Smart Contract Auditing & Security Review If you need it built right, deployed on time, and working in production — let's talk. Saba

You don't need someone who "knows AI." You need someone who can take an AI feature from idea to production and keep it working when real users hit it. That's the gap I fill. WHAT I BUILD AI-powered products, end to end. LLM integrations with Claude and OpenAI, RAG pipelines over your own data, multi-agent systems, and the evaluation and cost-control layers that decide whether an AI feature survives contact with real users. All of it wrapped in production-grade software: React/Next.js on the frontend, Node/NestJS on the backend, React Native on mobile, Supabase, Postgres, or Firebase underneath. For Web3 projects, I've shipped on Solana, EVM, Bitcoin and XRPL. Typical engagements look like this: An AI feature added to your existing product, scoped so it doesn't break what already works. A full MVP built from scratch, from architecture to app store. A mobile app for a market where offline behavior and payment quirks actually matter. An automation layer connecting your CRM, ads, and messaging so leads stop falling through cracks. Or a rescue job on a codebase another team left half-finished, which happens more often than anyone admits. RESULTS THAT MATTER TO YOU App I built has passed 1M+ downloads. My attribution SaaS runs live against Amazon and Meta production APIs, which means I've been through their real approval processes, not sandbox demos. I've delivered a multi-agent AI CRM, an automated AI podcast pipeline using Google Cloud TTS with queued processing, Automation system with custom CRM that helped startup grow from $25K/month to $45K/month, fintech mobile apps with multi-currency support, and marketplace platforms serving emerging markets. Seven plus years of full-stack work sits underneath all of it. Because I've built and run my own products, I think about your project the way an owner does. I'll flag scope that won't pay off before you spend money on it, not after. Sometimes that costs me billable hours. It's still the right call. HOW WE'LL WORK You get a clear milestone plan before any work starts, honest timelines instead of optimistic ones, and progress updates you don't have to chase. Communication happens in plain language, not jargon designed to keep you dependent. If something slips, you hear it from me first with a recovery plan, not an excuse. I've held Top Rated Plus status by finishing projects, not collecting them. Most of my new work comes from clients who came back or referred someone, which only happens when the first project actually shipped. WHO THIS ISN'T FOR If you're hunting for the lowest bid, I'm not it. If you want someone who says yes to everything, same. I push back when I think a feature is a mistake, and clients who want the thing built right tend to appreciate that after the first sprint, not before. NEXT STEP Send me your spec, or just describe the business problem in plain language. I'll respond with how I'd approach it, what it roughly takes, and whether I'm the right fit. If I'm not, I'll tell you that too. 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

Hi, I’m Muhammad Mustafa Tahir, a Full Stack Developer with 4+ years of experience building modern web applications and blockchain solutions. With a strong Computer Science background and hands-on experience across 25+ successful projects, I specialize in developing scalable, secure, and high-performance applications using the MERN stack and Web3 technologies. From full-stack web platforms to smart contracts and decentralized applications, I focus on delivering clean, maintainable, and reliable solutions that help businesses grow. ### What I Can Build for You: ✅ Full Stack MERN Applications (MongoDB, Express.js, React.js, Node.js) ✅ React.js & Next.js Frontend Development ✅ REST APIs & Backend Development ✅ Authentication & Authorization Systems (JWT, OAuth, Firebase) ✅ Database Design & Optimization (MongoDB, PostgreSQL) ✅ Smart Contract Development (Solidity) ✅ DeFi Platforms: Staking, Yield Farming, Lending & Borrowing Protocols ✅ Token Launch Platforms: ICO, IDO & Token Vesting Systems ✅ NFT Marketplaces & Web3 DApps ✅ Wallet Integration: MetaMask, WalletConnect & Other Web3 Wallets ✅ Cross-Chain Bridges & Multi-Chain Token Solutions ✅ Web3 APIs & Backend Integration ✅ Blockchain Data Indexing & Analytics (The Graph, Chainlink Oracles) ✅ Decentralized Storage Integration (IPFS, Pinata, Arweave) ✅ Smart Contract Auditing, Bug Fixing & Performance Optimization I take on projects only when I’m confident I can deliver exceptional results. Whether you need a modern full-stack web application, a blockchain solution, or a combination of both, I am committed to delivering secure, scalable, and high-quality products. Let’s discuss how I can help bring your idea to life. Best regards,

Hi, I'm a Passionate Full Stack (MERN) Developer! With 1+ year of hands-on experience building full-stack solutions using MongoDB, Express, React, and Node.js, I specialize in crafting scalable apps, secure APIs, dynamic admin panels, and rich frontend interfaces. Whether you're starting from scratch or upgrading an existing project — I’m here to help you build, scale, and deploy it efficiently. ⇨Tech Stack Expertise: ⨀Frontend: React.js, Next.js, Redux Toolkit, Tailwind CSS, Bootstrap, HTML5, CSS3 ⨀Backend: Node.js, Express.js, RESTful APIs, Authentication (JWT, OAuth) ⨀Database: MongoDB, Mongoose, Aggregation Pipelines, Data Modeling ⨀Version Control & CI/CD: Git, GitHub, GitHub Actions, Vercel, Render, Railway ⇨Skills & Capabilities: ◾ Full-stack development using the MERN stack ◾ Auth Systems: Secure sign-up/login, token-based auth, protected routes ◾ Admin & Dashboard Panels: Order, product, and user management with charts and metrics ◾ E-commerce Systems: Cart, checkout, payment gateway integration, COD flows ◾ Billing & Invoicing Software: Generate invoices, print/PDF support, shop-based solutions ◾ Real-Time Features: Notifications, WebSocket-based chat (Socket.io) ◾ Cloud Services: Cloudinary (image upload), Firebase, Stripe API ◾ Custom API Integration: Connect any 3rd-party services or internal backend modules ◾ Testing Tools: Postman, console debugging, error handling middleware ◾ Deployment: Vercel, Netlify (frontend), Railway/Render/EC2 for backend, MongoDB Atlas ⇨Projects I've Worked On: ✅ Multi-vendor E-commerce website with admin & seller portals ✅ Physical shop billing software integrated into a cloud-based admin panel ✅ Bidding/offer-based product marketplace ✅ Role-based dashboards with stats, metrics, and email integration ✅ User chat and real-time order notifications Hi, I'm a Solana Blockchain Developer | Rust Smart Contract Engineer! As a Web3 developer with deep experience of 1+ year in the Solana ecosystem, I design and build decentralized applications (dApps), token economies, and smart contract infrastructures using Rust and Anchor. I specialize in launching meme coins,buy/sell function logics, developing NFT platforms, integrating DEX features like Raydium, and creating scalable full-stack blockchain solutions. Whether you're building the next viral token, NFT marketplace, or on-chain game — I can help you architect and deploy production-grade Solana-based applications. ⇨Blockchain Stack Expertise: ↪Chain: Solana (devnet, testnet, mainnet-beta) ↪Smart Contracts: Rust, Anchor framework, Solana Program Library (SPL) ↪Development Tools: Solana CLI, Anchor CLI, Solana Playground, Phantom Wallet, Solscan ↪Frontend Integration: React.js, Solana Wallet Adapter, Next.js, Web3.js/solana-web3.js ↪On-chain Storage: PDA (Program Derived Addresses), Accounts, Seeds ↪Deployment & Verification: Devnet deployment, custom IDLs, local validator testing ↪Data & RPC: Solana RPC endpoints, custom indexers, Mempool & Block parsing ⇨Skills & Capabilities: ◾ Rust Smart Contract Development using Anchor ◾ Meme Coin Marketplace: Bonding curve mechanics (CPMM), launchpads, tokenomics ◾ NFT Platform Development: Minting, metadata, Candy Machine, custom mint sites ◾ DEX & Raydium Integration: Token migration post-bonding, swap integrations ◾ Wallet Integration: Phantom, Solflare, Backpack, Glow (custom dropdowns, modals) ◾ Custom Token Management: SPL token creation, metadata assignment, airdrop tools ◾ Program Upgrade Management: Anchor upgradeable programs with version control ◾ Frontend + Smart Contract Sync: React interfaces powered by Solana smart contracts ◾ Programmatic Interactions: Transaction building, CPI (Cross Program Invocations) ◾ Blockchain Analytics: Fetching block data, decoding transactions, indexing tokens ◾ Real-Time Indexing: Custom logic to listen to token mints, trades, or account changes ⇨ Solana-Based Projects I’ve Worked On: ✅ Meme Coin Marketplace with dynamic bonding curve and post-launch Raydium listing ✅ NFT Mint Platform integrated with Phantom wallet and Solana devnet ✅ Token Creation Tool with full metadata input and programmatic SPL minting ✅ dApp UI Integration with connected wallets, signed messages, and smart contract calls