Yohannes G.Private profile: Upwork shows its earnings only to signed-in members, so we check it every few weeks, not daily. MRR here is a rough estimate (Upwork's six-month earnings ÷ months active). Last read Nov 5, 2026.

Full-Stack & Blockchain Engineer | React, Node.js, Python, Cardano & AI Integration | 5+ Years I build fast, reliable, production-ready software from full-stack web apps to decentralized Web3 platforms and AI-integrated systems. Over the past 5+ years I've led remote engineering teams, shipped products end-to-end, and improved sprint velocity by 30% while keeping code clean and maintainable. Here's what I bring to your project: 🔹 Full-Stack Development — React, Next.js, TypeScript, Node.js, NestJS, Python (FastAPI, Django), and Go. I build scalable backends, intuitive frontends, and well-structured REST/GraphQL APIs. 🔹 Blockchain & Web3 — Smart contract development on Cardano (Plutus/Haskell) and TON, NFT minting pipelines, wallet integrations (Nami, Eternl, TON Connect), and tokenomics. I've also performed smart contract security audits before mainnet launches. 🔹 AI Integration — Hands-on with Claude and OpenAI APIs, MCP server configuration, RAG, LangChain, and AI agent development. I build systems where AI outputs trigger real, automated actions. 🔹 DevOps & Architecture — CI/CD with Docker and GitHub Actions, cloud deployment, query optimization, and system design built to scale. A few results I'm proud of: Cut failed NFT mint transactions by 25% with an automated minting pipeline Reduced average API response time from 850ms to under 200ms through query optimization and indexing Improved GraphQL API performance by 35% by eliminating data over-fetching Led teams of 5–7 engineers delivering Web3 and SaaS products from architecture to production Whether you need a new product built from scratch, an existing system improved, or a blockchain/AI feature integrated, I focus on clean, extensible code and clear communication throughout. 📩 I respond quickly and I'm always available for interviews and calls. Let's turn your idea into something real message me and tell me about your project.