Eugene G.

💎 Full-Stack FinTech & Web3 Engineer with 7 years of experience (Backend-First) 📈 Crypto payments, wallets, DeFi logic & production-grade smart contracts 🔐 Built for security, scalability, and real-world usage - not demos 👋 Hi, I’m a full-stack blockchain engineer with 6 years of experience focused on fintech and Web3 products that handle real value. I design and build secure backends, smart contracts, and clean dApp interfaces - from early MVPs to production platforms. I’ve worked on crypto wallets, payment flows, DeFi features, admin dashboards, and on-chain integrations, helping teams ship products that are stable, auditable, and ready to scale. 🚀 What I Build 🔹 FinTech & Crypto backends - Node.js APIs, PostgreSQL, webhooks, queues, audit logs 🔹 Wallets & payments - signing flows, transaction lifecycle, monitoring, admin tooling 🔹 Smart contracts - Solidity (ERC-20, escrow, staking, vesting; NFTs when needed as a feature) 🔹 DeFi logic - staking, rewards, permissions, on-chain/off-chain sync 🔹 Full-stack dApps - React / Next.js + Web3 integrations 🛠 Tech Stack 🚀 Frontend: React, Next.js, TypeScript ⚙️ Backend: Node.js, NestJS, REST / GraphQL ⛓️ Blockchain: Solidity, Ethers.js, Web3.js, Hardhat 📊 Data: PostgreSQL, Redis 🛠️ Infra: AWS, Docker, CI/CD 🧠 How I Work I’m backend-first, but fully full-stack - meaning I usually design the backend, contracts, and data flows first, then connect them to a clean, user-friendly frontend. I understand how expensive mistakes are in fintech and crypto, so I always build with testing, QA, logging, and security checks before release. 💬 One thing I usually clarify first: Are you building a wallet/payment flow, a DeFi feature (staking, escrow, on-chain logic), or a full platform with admin and reporting? Let’s align on the scope and build something solid from day one