o3osatoshi

**Product** Modular DeFi protocol on EVM enabling permission-less yield tokenization and fixed-yield trading **Contributions** Built the Napier V2 web frontend from scratch, largely on my own. Supported the protocol’s growth, helping total value locked (TVL) scale from $0 to $40 million+. **Tech Stack** TypeScript, Next.js, Tailwind, Wagmi, Viem, GraphQL, Zod, Neverthrow, Vercel, Sentry, Figma **Knowledge** Yield tokenization, Fixed yield mechanics, DeFi UX patterns, Smart contract interactions

**Product** CRM platform for beauty salons using LINE to automate customer engagement and improve retention **Contributions** Built both the frontend and backend of the Salon Brain platform almost entirely from scratch. Supported MVP validation and helped scale the service from zero to 100+ contracted salons. **Tech Stack** TypeScript, Next.js, Tailwind, React Firebase Hooks, Express, Firebase **Knowledge** Multi-tenant architecture, MVP development and validation, CRM strategy for beauty salons

**Project** Conducted technical research and validation to formulate and plan enterprise Web3 strategy **Contributions** Investigated the technical mechanisms of Uniswap, contract wallets, account abstraction, etc. Developed POC prototypes for ticket and stamp rally NFTs for real-world implementation. Considered wallet-centered Web3 strategies and regularly reported findings to senior stakeholders. **Tech Stack** Solidity, TheGraph, IPFS, Chainlink, TypeScript, React, Express, Amplify, AWS **Knowledge** Web3 fundamental architecture, Web3 business strategy in Web2 enterprises

**Product** Gateway connecting the TBCASoft consortium blockchain (HIVEX) and legacy payment systems **Contributions** Coordinated system design and interface specifications with internal and external engineers. Managed development schedules and cross-team tasks, taking external partners into account. **Tech Stack** Java, Spring Boot, PostgreSQL, Docker, AWS **Knowledge** Payment system architecture, Blockchain interoperability, Cross-company engineering coordination

**Product** Mobile app that auto-tags and organizes screenshots to support brainstorming and task reminders **Contributions** Took on the challenge of 0-to-1 consumer business creation as the team and technical leader. **Tech Stack** JavaScript, React, Python, Firebase **Knowledge** Lean startup, Solution-product fit exploration, Agile development, Team management