0xalche
Full Stack Web3 Dev | Specializing In Smart Contracts & D Apps On Solana & Evm
Web3 engineer with 7+ years of blockchain experience, specializing in Solidity and EVM-based protocol development with a strong focus on security, performance, and AI-assisted systems. Background in DeFi, prediction markets (InfoFi), GameFi, decentralized social platforms, and RWA tokenization, delivering optimized smart contracts that reduce execution costs and scale reliably in production environments.
Experience: 7 years
Yearly salary: $100,000
Hourly rate: $50
Nationality: 🇵🇱 Poland
Residency: 🇵🇱 Poland
Experience
Senior Web3 | Solidity Engineer
XPad 2025 - 2025
● Developed and deployed a bonding curve smart contract with proxy upgradeable architecture, automating ETH-token pair migration to Uniswap upon reaching 4 ETH liquidity. ● Engineered and optimized the backend architecture with a high-performance data pipeline, achieving <200ms response latency for seamless smart contract and frontend integration. ● Integrated a KMS-secured multi-signature wallet for transaction validation and fund management, enhancing platform security by 2x. ● Spearheaded security audits and threat modeling for smart contracts and infrastructure, identifying and mitigating vulnerabilities to reduce potential exploits.
Lead Solidity Engineer
Lucia Protocol 2021 - 2025
● Designed and implemented a custom rebasing ERC20 token, employing EIP-1559 and data packing, reducing gas costs by 15%. ● Developed and secured core lending/borrowing features in Solidity, integrating Chainlink oracles and OpenZeppelin libraries, managing over $5M in TVL. ● Spearheaded and fortified security audits, collaborating with external auditors and implementing formal verification methods, reducing potential bug count by 20%. ● Led and mentored a team of junior developers through code reviews and technical training, improving the team's code quality score by 25%. ● Architected and deployed a decentralized governance module, integrated with snapshot.org, increasing community participation.
Full-Stack Blockchain Developer
360 Foundation 2018 - 2021
● Engineered DeFi smart contracts for staking, vesting, and bonding protocols, enhancing security through audits and managing $8 million in TVL on the Polygon network. ● Forked Uniswap V2, customizing it for 360 token swaps, optimizing gas efficiency by 98%, and enhancing the user experience. ● Secured smart contracts by implementing rigorous testing, addressing vulnerabilities, mitigating potential exploits, and passing security audits.
Skills
aws
bitcoin
blockchain
defi
nextjs
node
react
rust
smart-contract
solana
solidity
web3
web3js
english
polish