Sato Ryo

Blue Label Labs

Developed an add-on marketplace using React and Node.js that allowed existing customers to buy add-ons without upgrading their packages. Migrated projects to GitHub Actions to speed up deployment and introduced branch deployments. Created self-service upgrades for customers to switch to better packages. Worked towards creating reusable front-end architecture and components, utilizing a UI library and starter project, conducting A/B testing, and implementing E2E test automation across multiple projects. Developed a monthly subscription flow to improve conversion rates.

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Role: Senior Full-stack Engineer

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Chaintope

Led the development of decentralized applications (DApps) and smart contracts on Ethereum, Binance Smart Chain, and Polygon, overseeing a team of junior developers to ensure high-quality code and security compliance. Designed and implemented secure and gas-efficient smart contracts in Solidity, resulting in a 20% reduction in transaction costs across multiple projects. Collaborated closely with product and front-end teams to integrate blockchain functionality with user-facing interfaces, enhancing the user experience and maintaining Web3 compatibility. Conducted in-depth audits and optimizations for smart contracts, preventing security vulnerabilities and ensuring adherence to best practices. Stayed updated on emerging blockchain trends and integrated new tools and frameworks, such as Hardhat and Truffle, to streamline development and testing processes.

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Role: Senior Blockchain Developer

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Emurgo

Developed a blockchain project, written in Go with tools built in Node.js. Integrated the EVM and developed the back and front end of Hubble scan block explorer for Galactic and Burrow blockchains. Led the team for a few months after the previous team lead resigned and conducted the testnet successfully. Designed and implemented the platform using Truffle and Solidity. Played a key role in technical design and implementation following the requirements given by a team of four professors who raised $3+ million for the project. Conducted audit and security testing of smart contracts using Slither and test scripts .

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Role: Blockchain Developer

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Cuttlesoft

Delivered a dynamic web report dashboard to show month-over-month progress in sales over the last six years. Developed the pages for managing the automated distribution of monthly Jerky subscription orders. Created management pages for managing user profiles and management roles. Developed a page for users to maintain their accounts and preferences.

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Role: Web Developer

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