I design, build and audit smart contracts and on-chain infrastructure that run on time — every time. Over seven years I have shipped DeFi protocols, cross-chain bridges and token systems that together secure hundreds of millions in value. I care about the same things a good railway does: precision, safety and predictable schedules. Gas-efficient code, formally reasoned invariants, and documentation that lets the next engineer board without delay.
viaSolidity, Foundry, Rust, ZK circuits
viaSolidity, Hardhat, The Graph, TypeScript
viaSolidity, Web3.js, Node.js, PostgreSQL
viaGo, Python, Docker, Ethereum JSON-RPC
An ERC-4626 vault system that routes deposits across lending markets, rebalancing by risk-adjusted yield. Keeper-driven harvests with slippage guards and per-strategy debt ceilings.
A light-client based message bridge with optimistic verification and a fraud-proof window. Handles token transfers and arbitrary calls between five EVM chains.
Privacy-preserving proofs of age and residency: users prove an attribute without revealing the underlying document. Groth16 circuits with an on-chain verifier and a revocation registry.
Open-source governor contracts with delegated voting, timelocked execution and gasless off-chain signalling. Used by several community treasuries to manage on-chain proposals.
I started out writing payment back-ends and moved onto the chain in 2018, when I realised that smart contracts are the strictest timetable in software: once deployed, they run exactly as written — no delays, no excuses.
Since then I have worked across the full journey: protocol design, contract implementation, security review, indexing and the dApp frontends that sit on top. My strongest track is DeFi and cross-chain infrastructure, with growing work in zero-knowledge proofs.
I work best with teams that value careful reviews, written specs and honest status reports. Based in Kielce, Poland, and collaborating remotely across European and US time zones.