UNV

unvalley

Software Engineer

I’m a software engineer based in Tokyo, writing mostly Rust and TypeScript. I’m a core contributor to Biome, and on the side I build small, focused tools. Curiosity is the key.

You can reach me on GitHub, X, Instagram and LinkedIn.

Collections

  • BlogWriting
  • ThingsObjects
  • BooksReading
  • ToolsStack

Projects

  • rtMeta task runner CLI
  • fyber.studioFashion marketplace web app
  • EpheEphemeral Markdown Paper
  • BiomeWeb Toolchain written in Rust
  • TabXChrome tab manager
  • cognitoxLocal Cognito emulator
  • spherCanvas layout experiment

Talks

  • Plugin System in Rust based JavaScript/TypeScript LintersTSKaigi 2025
  • OSSと継続的に関わる方法の模索maguro.dev #1
  • AIと作るEphemeral Markdown PaperFindy LT
  • Thoughts and experiences on Rust and TypeScriptnagoya.ts #3
  • Next generation front-end crosstalkVue Fes 2024
  • Rust製TypeScript Linterにおける型情報Lintルールの模索TSKaigi 2024
  • Behind VS Code Extensions for JavaScript / TypeScript Linting and FormattingVSCode JP 2024
  • Behind Biome | Biomeの裏側 (Parser/Linter)burikaigi 2024
  • Biome is for JavaScriptersWeJS #43
  • Better Unit TestingEnglish Night #13
unvalley
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© 2026
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UNV