Solidity Developer

Led backend development for a DeFi lending protocol and integrated an NFT marketplace, supporting over $10M in total value locked (TVL) and serving 5,000+ active users, ensuring scalability and security in high-volume transactions. Designed and implemented ERC-4337 account abstraction solutions to enable gasless transactions, significantly enhancing the Web3 user experience for enterprise clients and improving user onboarding and transaction efficiency. Developed robust cross-chain interoperability solutions using Cosmos SDK, IBC Protocol, and Chainlink CCIP, facilitating seamless asset transfers between Ethereum, Tendermint-based chains, and Polygon, achieving a 99.9% success rate in cross-chain transactions. Implemented advanced zkSNARKs for privacy-preserving transactions, reducing the on-chain data footprint by 70%, while maintaining verifiable computation integrity and ensuring privacy compliance. Integrated React and Next.js frontend with Web3.js, enabling interactive and seamless dApp interfaces and ensuring smooth interaction with smart contracts and wallet connections (e.g., MetaMask, WalletConnect).

Designed and delivered Ethereum and Hyperledger Fabric solutions, building dApps for supply chain traceability, digital identity, and tokenized asset management for both startups and enterprise teams. Developed and deployed ERC-20 and ERC-721 smart contracts using Solidity, driving the success of token sales, crowdfunding platforms, and NFT projects, processing over 50,000 transactions across various client implementations. Integrated Uniswap V2/V3 for automated market-making (AMM) functionality and liquidity pools, optimizing DeFi protocols and ensuring optimal price execution for client platforms. Implemented private blockchain networks using Hyperledger Fabric for enterprise clients in finance and healthcare, creating permissioned ledger systems that adhere to stringent data privacy and compliance requirements. Built and optimized Node.js APIs to seamlessly integrate blockchain solutions with existing enterprise infrastructures, ensuring smooth and efficient communication between distributed ledgers and legacy systems.

Developed application-layer network protocols in C and Python for the real-time management of over 1,000 electronic gaming machines across multiple locations, achieving sub-second response times for critical operations. Designed and implemented Python based automated test frameworks to validate stable communication between gaming terminals and backend servers in high load operating conditions. Aligned with hardware engineering to integrate embedded devices with backend services, improving protocol stability and minimizing payload size for constrained networks. Maintained and enhanced the legacy C codebase for gaming machine firmware, implementing bug fixes, performance improvements, and ensuring the stability of mission-critical systems in a high-availability environment.