Kimizu Yamasaki
Frontend Engineer at Freelance
Ehime Prefecture, Japan
Summary
👤
Senior🎓
Top SchoolKimizu Yamasaki is a frontend engineer with 11 years of experience building performant, user-focused web applications from Japan’s Ehime Prefecture. They’ve led front-end modernization efforts—replacing legacy corporate sites with Next.js, Astro, and headless CMS—and designed a turborepo monorepo while mentoring junior engineers. Past roles include improving Core Web Vitals and SEO, implementing TypeScript conversions, and shipping Next.js and Firebase-based B2B event and rental apps with Material UI and vanilla-extract for robust CSS management. Early work includes building a React/Redux TypeScript airport user management app and contributing to Java Web APIs that centralized customer data for airline staff. Practical, hands-on, and detail-oriented, Kimizu combines UX sensibility with performance-driven engineering and a track record of raising team capabilities through code review and onboarding.
10 years of coding experience
3 years of employment as a software developer
Bachelor's degree, Economics, Bachelor's degree, Economics at Ehime University
Github Skills (44)
flashing10
nextjs10
browser10
preference10
react10
session-cookie9
static-site-generator9
expressjs9
perfect9
electron9
javascript9
typescript9
hybrid9
mdx9
signed9
Programming languages (4)
Github contributions (5)
kimizuy/with-mdx-bundler-app
Feb 2021 - Nov 2021
Contributions:21 commits, 9 pushes, 1 branch in 8 months
kimizuy/react-chartjs
Oct 2021 - Jun 2023
A simple React wrapper for Chart.js.
Contributions:6 releases, 16 PRs, 28 pushes in 1 year 8 months
reactchartreact-wrapperchartjs-pluginchartjs
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