Md Ahatashamul I.

Top Rated | 100% Job Success Score | 1,600+ hours | $20K+ earned | All 5-star reviews I build full-stack web apps, mobile apps and Web3 products end to end, from database design and APIs to the UI, smart contracts and deployment. You work with one developer from start to finish, with no handoffs and no gaps. Most of my Upwork work has been long-term. I worked with one US client for almost two years, building their decentralized social platform, its React Native mobile app, a DAO governance system and a decentralized exchange. Clients who work with me once tend to come back, and I'd like to earn that same trust with you. What I can build for you: 1. Full-stack web apps and dashboards with Next.js, React, Node.js and TypeScript, backed by PostgreSQL, MongoDB or Supabase. 2. Web3 and blockchain products: smart contracts in Solidity (Ethereum / EVM) and on XPR Network (Proton), DAO governance, decentralized exchanges, and token and wallet integrations. 3. Cross-platform mobile apps for Android and iOS with React Native and Expo, from authentication and API integration to store releases. 4. REST APIs, OAuth and third-party integrations, including public APIs with API-key access. 5. AI-powered features: integrating AI and LLM APIs into web apps. 6. Web scraping and automation with Node.js and Puppeteer. 7. CI/CD pipelines with GitHub Actions and automated deployment. How I work: I take ownership of the whole feature, not just my part. You get clear updates, early warnings if something is at risk, and clean code your team can maintain after delivery. I finish what I start. Tech stack: Frontend: Next.js, React, TypeScript, Tailwind CSS, Material UI Mobile: React Native, Expo Backend: Node.js, Express, REST APIs Data: PostgreSQL, MongoDB, Supabase Web3: Solidity, Ethereum (EVM), XPR Network / Proton, smart contracts DevOps: GitHub Actions, Vercel, Git Tell me what you're building. Send a short message with your goal and timeline, and I'll reply within a few hours with a clear plan.