Solidity Developer
Software Engineer
Senior backend Web3 developer with 6+ years of experience building MEV bots, smart contracts, and scalable microservices. Strong in EVM internals, system design, and solving complex infrastructure challenges
Experience: 6 years
Yearly salary: $72,000
Hourly rate: $0
Nationality: 🇵🇱 Poland
Residency: 🇵🇱 Poland
Experience
Full stack Developer
NDA, Remote 2024 - 2025
Tech: Node.js, Solidity, AI APIs, Docker, AWS, Hardhat • Engaged in long-term freelance contracts involving intersection of Web3 and AI under strict confidentiality. • Developed software using RAG, ai text to voice, image to text and tools usage
Team Lead & System Architect
Timeus Lab 2020 - 2024
Tech: Node.js, Solidity, Go, React, PostgreSQL, AWS, Hardhat, Elixir, Blockscout, Docker, CI/CD • Designed and led development of a decentralized lending platform using Uniswap V3 LPs, Chainlink price oracles, and dynamic collateral management; contracts audited by Halborn for production-grade security. • Engineered a profitable MEV bot using Node.js and AWS-hosted Binance smart chain nodes, optimizing mempool interactions and gas strategies to generate up to $200,000/week in peak profit. • Built and maintained a custom EVM-compatible blockchain, modifying BSC consensus, deploying a Uniswap fork, multi-chain bridge, and staking contracts. Used a popular EVM explorer Blockscout with public fixes that make it compatible with bsc chain. • Forked and customized Lisk/ARK chains to develop a private blockchain platform with adjusted node software, wallet, and explorer features. • Developed and audited smart contracts for token pre-sale, staking, and NFT-based game logic using Solidity + Hardhat. • Created a Chrome extension with Node.js + React for real-time NFT collection analysis, using proxy rotation and optimized data pipelines to avoid rate limits and capture live metadata.
Backend Developer
Checkblock 2019 - 2020
Tech: Node.js, HTML, Mongodb • Led architecture and full implementation of a high-load system for monitoring Bitcoin onchain activity. Details Poland [email protected] Links Linkedin Github Skills JavaScript / TypeScript Solidity Nodejs React MongoDB PostgreSQL Languages English Ukranian Russian • Developed a weight-based algorithm for Bitcoin AML scoring as part of a risk assessment service.
Backend Developer
Checkblock 2019 - 2021
Tech: Node.js, HTML, Mongodb • Led architecture and full implementation of a high-load system for monitoring Bitcoin onchain activity. • Developed a weight-based algorithm for Bitcoin AML scoring as part of a risk assessment service.
Skills
solidity
english