leoyoshida

•Took part in the development of several DApps like NFT marketplace, DeFi utilizing Solidity, React.js, Node.js, Web3.js and Ethers.js. •Implemented ERC20, ERC721, ERC1155, ONFT721(A) token standards on Ethereum and LayerZero protocol for cross-chain NFT marketplace. •Participated in developing SSI(Self Sovereign Identity) Wallet using ZKProof. •Implemented modular contract architectures to achieve reusability and maintainability. •Implemented best-practices in gas optimization techniques. •Implemented several methods to enhance the security of smart contracts. •Implemented unit and integrated testing cases using Chai and Hardhat. •Fixed out possible security vulnerabilities of the smart contracts. •Participated in 300+ code reviews and smart contract audits to ensure code quality and found out critical issues and resolved.

•Used Solidity to build Smart Contracts for NFT marketplace. •Developed and upheld a widely adopted implementation of the ERC20, ERC721, and ERC1155 token standards. •Implemented best industrial practices in gas optimization, resulting in significant cost savings. •Performed gas optimization and upheld 50+ security audits and vulnerability assessments for newly created smart contracts. •Developed Frontend and Backend using React.js, Express.js MUI and Tailwind framework. •Designed and implemented database management system using MySQL, PostgreSQL, MongoDB.

•Implemented JavaScript APIs to investigate information about newly launched Blockchain protocols. •Participated in developing smart contracts such as NFT marketplace. •Designed and developed 5+ websites utilizing JavaScript, TypeScript, React.js, Redux, Laravel and successfully launched. •Extensively used Redux for application state management. •Participated in code reviews and testing to ensure code. •Utilized Git and GitHub for version control.