About

Full-stack engineer. I work across Web3 (DeFi, Solidity, wagmi/viem) and Web2 (CRM, Firebase, Express). I care about type safety, tests, CI/CD, and clean UX. Recently supported an EVM-based DeFi protocol frontend from zero to $40M+ TVL.

Skills

  • Frontend: TypeScript, React, Next.js, Tailwind CSS
  • Web3: Solidity, wagmi, viem, The Graph
  • Backend/Infra: Node.js, Express, Prisma, PostgreSQL, Firebase, AWS, Docker, Vercel
  • Quality/Tooling: Zod, Neverthrow, Jest/Playwright, Sentry, Turborepo, GitHub Actions, Figma

Experience (Highlights)

  • Napier Labs — Frontend Engineer (2024-08 → 2025-04)
    Built V2 web frontend for an EVM DeFi protocol, largely solo. Tech: TypeScript, Next.js, Tailwind, wagmi, viem, GraphQL, Zod, Neverthrow, Vercel, Sentry.
  • Salon Brain Inc. — Full-stack Engineer (2023-03 → 2024-07)
    Built a CRM 0→1 across frontend/backend. Tech: TypeScript, Next.js, Tailwind, Express, Firebase.
  • SoftBank Corp. — Tech Researcher (2021-04 → 2023-10)
    Researched corporate Web3 strategy (Uniswap, AA, contract wallets), delivered POCs and internal reports.
  • SoftBank Corp. — Technical PM (2017-06 → 2022-03)
    Gateway design bridging consortium chain and legacy payments.

Education

  • The University of Tokyo, Graduate School of Frontier Sciences
  • Rikkyo University, Faculty of Science (GPA 3.72)

Links