Senior full-stack engineer / team lead with 13 years of experience. Former CTO. Last four years on Web3; before that fintech, payments, KYC/compliance, healthtech, IoT, and realtime platforms — microservices, GraphQL, WebSockets, gRPC, and mobile (React Native).

Building lending and credit-card interfaces at HypurrFi — a DeFi lending protocol and on-chain credit card on Hyperliquid, alongside engineers from Aave, Kraken, Chainlink, Magic Eden, and Gitcoin. Backed by Robot Ventures.

I work across the full pipeline from contract events to UI:

• Frontend: React, Next.js, TypeScript DApp consuming on-chain data
• On-chain reads/writes: Wagmi, Viem
• Indexing: Ponder (TypeScript EVM indexer) streaming contract events into a queryable store
• Backend services: Node.js (REST APIs powering the DApp, Telegram notification bots, price-pusher, on-chain data CLI for AI agents) and Go (credit card infrastructure)
• CI/CD: Own pipelines for the indexer, price-pusher, and notification services

• Astaria — Full-stack engineer on an NFT-backed lending protocol founded by the ex-CTO of SushiSwap. $8M seed from True Ventures, Arrington Capital, Ethereal Ventures, Wintermute, Genesis Trading, Flow Traders, and 20+ angels (Anthony Sassano, Sam Kazemian, Tim Beiko, Meltem Demirors).
• MYSO Finance — Lead Frontend / Full-Stack Developer on a covered-call options yield protocol. Backed by Wintermute, Nexo, GSR, HashKey Capital, Enzyme Finance, and 10+ institutional partners. Used by DAO treasuries (Telos, Evmos) and HNW token holders.
• King Muffin — CTO for 5 years. Built an R&D engineering org from scratch in Ukraine, recruited and led a team of 10 (engineering, DevOps, QA, hiring), and shipped 12 products end-to-end across fintech, healthtech, and IoT. Notable: Meisterfit (athlete training platform — real-time React + React Native + microservices with WebSocket, gRPC, Linkerd2), Factly (KYC/compliance for financial institutions), Mediator (payments platform), Tototheo (real-time 3D web portal with GraphQL + Apollo + Hasura + WebSocket), and Compomatic (top 100 of 1,500+ companies at Slush 2016). Standardized the org on TypeScript, React, Node.js, PostgreSQL, Kubernetes, and GCP. Acquired by Lendiron Ltd in 2021, where I stayed on as VP of Engineering.

Frontend: React · Next.js · React Native · TypeScript · Wagmi · Viem · Zustand · Redux · React Query · Apollo Backend: Node.js · NestJS · Go · GraphQL · WebSocket · gRPC · REST Web3: Ponder · Solidity (integration) · EVM · DApp Architecture Data: PostgreSQL · MySQL · MongoDB Testing: Vitest · Jest · Playwright Cloud: AWS · GCP · Vercel · Railway · Docker · Kubernetes

• LinkedIn: linkedin.com/in/mbezruk
• Email: lord.kolima@gmail.com

Open to senior full-stack, team lead, and staff roles — Web3, DeFi, fintech, or adjacent. DMs welcome on LinkedIn.