Work Experience
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Anthropic Dec 2025 – presentMember of Technical Staff
Working on the Claude Code and Bun JS runtime teams, focusing on Claude Code CLI performance, upstream JavaScriptCore optimizations and bug fixes, and Bun–JavaScriptCore integration.
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Bun Aug 2025 – Dec 2025Systems Engineer
Worked on upstream JavaScriptCore optimization and bug fixes, and Bun–JavaScriptCore integration. Acquired by Anthropic.
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Ubie Mar 2022 – Aug 2025Product Engineer
Contributed to product development within a scrum team, worked as a full-stack engineer on a new business, integrated two Next.js applications, and more.
Activities
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WebKit Feb 2024 – presentReviewer (Feb 2025 – present), Committer (Aug 2024 – Feb 2025)
Working on JavaScriptCore. Merged 600+ patches covering spec-compliance fixes, JIT compiler optimizations, builtin function optimizations, and new ECMAScript feature implementations (e.g.,
using,import defer). -
Prettier Sep 2019 – Aug 2025Maintainer
Worked across bug fixes, new feature implementation, code review, issue triage, release blog writing, release management, and shipping releases.
Education
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University of Tsukuba Apr 2019 – Mar 2025
B.E. in Information Science