I'm Tatsu, a software developer based in Japan, a native Japanese speaker, and I write code mostly in TypeScript, Rust, and Python. I want to work around the world and collaborate with people from different cultures.
Feel free to reach out anytime or leave a reaction on any of my public repositories — it's always welcome!

• Languages: TypeScript, Rust, Python
• Backend / Infra: FastAPI, Supabase, PostgreSQL, Redis, Cloudflare Workers, Cloudflare KV
• Cloud / Platforms: Google Cloud Platform (Google Cloud Certified - Generative AI Leader), Cloud Run, Cloud Functions, Cloud Storage
• Frontend: Next.js, Astro, React, Vue
• Generative AI: Claude API and other LLMs for building AI-powered features
• Dev / DX: Docker, GitHub Actions

I document my architecture decision process for my OSS projects in GitHub Discussions. These RFCs cover topics like API gateway design, caching strategy (ValKey vs in‑process cache), Kafka adoption, and more.

• usage-gate RFCs: Discussions in the “⚒️ RFC” category for usage-gate (https://github.com/ttatsato/usage-gate/discussions/categories/rfc)

• My Project History: https://ttatsato.github.io/posts/project-history/
• Tech blog: https://ttatsato.github.io/
• LinkedIn: https://www.linkedin.com/in/tatsuyasatoh0803/