UNV
BLOGTHINGSTOOLSBOOKS

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.

PROJECTS

rtA Rust CLI that discovers task runners and lets you browse and run project tasks through one interactive command.
fyber.studioA curated fashion marketplace explorer for browsing brand-focused listings with rich filters across marketplaces.
EpheAn Ephemeral Markdown Paper for today. Less but handy features for plain Markdown lovers.
BiomeOne toolchain for your web project. I'm involved as a core contributor.
TabXA simple and tiny tab management chrome extension (OSS).
cognitoxAn Amazon Cognito emulator for local development.
spherA spherical layout experiment built on canvas.
UNV (This blog)A personal blog built with Next.js and MDX.

TALKS

Plugin System in Rust based JavaScript/TypeScript LintersSlides about Biome, Oxc, deno_lint, Rust, TypeScript, Linter for TSKaigi 2025
OSSと継続的に関わる方法の模索Slides about OSS for maguro.dev #1
AIと作るEphemeral Markdown PaperSlides about TypeScript,AI for Findy 個人開発のAI活用LT
Thoughts and experiences on Rust and TypeScriptSlides about Rust,TypeScript for nagoya.ts #3
Next generation front-end crosstalkSlides about JavaScript Toolchain, Rust for Vue Fes 2024
Exploring Type-Informed Lint Rules in Rust based TypeScript Linters | Rust製TypeScript Linterにおける型情報Lintルールの模索Slides about Biome, Oxc, deno_lint, Rust, TypeScript, Linter for TSKaigi 2024
Behind VS Code Extensions for JavaScript / TypeScript Linting and FormattingSlides about VSCode Extension, JavaScript, TypeScript, Linter for VSCode Conference Japan 2024
Behind Biome | Biomeの裏側 (Parser/Linter)Slides about Biome for burikaigi2024
Biome is for JavaScriptersSlides about Biome for We Are JavaScripters! @43rd
Better Unit TestingSlides about Testing for English Night #13