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.
11 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 (40)
react-developer10
nextjs10
react10
expressjs9
typescript9
browser9
stateless9
dns9
mdx9
react-developers9
compiler8
vercel8
authentication8
editor8
github-pages8
Programming languages (4)
Github contributions (5)
kimizuy/my-todo-app
May 2025 - Dec 2025
Contributions:41 PRs, 78 pushes, 4 branches in 6 months
kimizuy/electron-boilerplate
Jul 2024 - Mar 2026
Modern Electron Boilerplate
Contributions:16 PRs, 108 pushes, 5 branches in 1 year 8 months
Find and Hire Top DevelopersWe’ve analyzed the programming source code of over 60 million software developers on GitHub and scored them by 50,000 skills. Sign-up on Prog,AI to search for software developers.