Atsuo Koizumi

• Built a decentralized Green Planet ecosystem. • Developed the frontend of the ecosystem using React.js and Tailwind CSS. • Created the smart contract for the ECO token by Solidity, considering the ERC20 protocol of OpenZeppelin and Uniswap Router v2 for it to be traded in the Ethereum network. • Solved the security problems of the smart contract to pass the audit process of the Certik team.

• Built a decentralized NEYX ecosystem. • Created the website of the ecosystem using React.js, MUI (Material UI), Node.js, and Express. • Developed the smart contract for NEYX NFT using Solidity and the ERC721 protocol of OpenZeppelin. • Added a security process for whitelisted users using the Merkle-tree package. • Integrated the website and the smart contract using Web3 packages to complete the development of the NEYX ecosystem.

• Contributed to building a NFT marketplace. • Converted 14 UX/UI designs into live frontend pages using Next.js and Tailwind CSS. • Implemented a custom Cypress-based framework for end-to-end testing, with custom scripts, commands and integrations developed in Node.js, and upgraded it to Cypress 10. • Built the frontend of the NFT marketplace dashboard using React.js and MUI (Material UI).