andrasfarkas
Senior Blockchain Developer | Lead Web3 Engineer
Senior Blockchain Developer with 9+ years of experience architecting, developing, and deploying secure decentralized applications (DApps) and smart contracts across EVM-compatible networks and Solana. Expert in Solidity, Rust, Web3.js, Ethers.js, React, Next.js, Node.js, and TypeScript. Delivered 150+ production smart contracts and 20+ DeFi/NFT/Web3 platforms with strong focus on security audits, gas optimization, and scalable system architecture. Proven leader in Agile environments with experience mentoring engineers and owning end-to-end Web3 product delivery.
Experience: 9 years
Yearly salary: $40,000
Hourly rate: $30
Nationality: ðŸ‡ðŸ‡º Hungary
Residency: ðŸ‡ðŸ‡º Hungary
Experience
Software Engineer (Blockchain & Web)
Aventail Ltd 2020 - 2022
Built early Web3 prototypes and blockchain PoCs. Developed backend APIs with Node.js and Django. Created responsive web apps with React and REST API integrations. Implemented authentication, logging, and monitoring. Contributed to CI/CD pipelines and code quality improvements.
Blockchain Engineer / Full Stack Web3 Developer
Defintech KFT 2018 - 2022
Developed 50+ smart contracts (ERC-20, ERC-721, ERC-1155) for DeFi and NFT products. Built DApp frontends and admin dashboards using React and Next.js. Integrated wallet providers (MetaMask, WalletConnect) and crypto payments. Implemented staking, vesting, and liquidity pool contracts. Improved transaction performance and reduced gas usage by 25%. Collaborated with product, QA, and security teams in Agile sprints.
Senior Blockchain Developer/ Tech Lead
PONT Systems Zrt 2017 - 2020
Architected and deployed 60+ production smart contracts on Ethereum, Polygon, and Solana. Led development of 8+ DeFi and NFT platforms, including DEX, staking, and NFT marketplaces. Designed tokenomics models and on-chain governance (DAO voting, multisig). Conducted smart contract security audits, vulnerability remediation, and gas optimization (reduced fees by 30%). Built scalable Web3 frontends with React, Next.js, TypeScript, Web3.js, Ethers.js. Designed backend services with Node.js, REST APIs, WebSockets, PostgreSQL, and Redis. Deployed infrastructure on AWS using Docker and CI/CD pipelines. Mentored engineers and owned Web3 architecture decisions.
Skills
nextjs
node
python
react
rust
smart-contract
solidity
english