Seongjun Kim
Staff Frontend Engineer at Roofr
Old Toronto, Ontario, Canada
Summary
👤
Senior🎓
Top SchoolSeongjun Kim is a Staff Frontend Engineer with 10 years of experience crafting performant, accessible React and React Native applications from prototype to production. Based in Old Toronto, he has advanced through roles at Roofr and Drop, driving features, performance fixes, and CI/CD distributions while championing testing with Jest and React Testing Library. He has hands-on experience implementing SSR with AWS Lambda, Redis caching, real-time sockets, and map-heavy search interfaces using Google Maps and Mapbox. Comfortable across HTML/CSS ecosystems (SCSS, Tailwind, Bootstrap) and TypeScript, he also brings backend familiarity from Laravel and Docker-based services. Known for sharing knowledge through internal talks and tools—like a Next.js regex-highlighting utility—he balances deep technical craft with mentoring and cross-team collaboration.
10 years of coding experience
9 years of employment as a software developer
Android Developer Nanodegree Android, Android Developer Nanodegree Android at UdacityComputer programming, Computer programming at Seneca PolytechnicBachelor of Economics Economics, Bachelor of Economics Economics at University of Ulsan
Korean, English
Stackoverflow
11reputation
1kreached
0answers
2questions
Github Skills (200)
high-resolution10
storybook10
mapbox-gl10
react-pdf10
mnist10
zooming10
hybrid10
javascript10
browser10
pdf-viewer10
autoencoder10
react-framework10
api10
compiler10
google-maps-javascript-api10
Programming languages (5)
Github contributions (5)
intelcoder/toon-mobile
Feb 2017 - May 2017
Contributions:63 PRs, 84 pushes, 25 branches in 2 months
intelcoder/tech-blog
Jul 2021 - Nov 2022
Contributions:14 PRs, 62 pushes, 17 branches in 1 year 3 months
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