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Masahiko Matsumoto

Frontend Engineer

I build frontends with React and Next.js.

From architecture to implementation and code review. Fully remote, async-first, available from around 20 hours a week.

Available for new work

From October 2026
Hours
~20 hrs/week (negotiable)
Setup
Fully remote
Communication
Async-first (Slack / Notion). At most one recurring call per week
Scope
Architecture, implementation, code review / one-off to ongoing

Now

What I'm working on

Building side projects and writing about them. Currently interested in the Next.js App Router and performance work on content-heavy sites.

Lab

Things I'm building and testing

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Writing

Notes and articles

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