Jaewon Kim
Frontend Developer at Toss Securities
Seoul, South Korea
Summary
👤
Senior🎓
Top SchoolJaewon Kim is a frontend developer with over 10 years of experience building high-performance, real-time trading and consumer web applications using React and modern state management patterns. At Toss Securities he architects and implements latency-sensitive trading features, WebSocket-driven real-time UIs, and cross-market funnels while optimizing rendering and build-time computation to keep interfaces responsive under heavy load. He has a strong track record of creating team libraries (Recoil access outside React), test-friendly utilities, and automated tooling like SVG optimizers and logging systems that improved developer and designer workflows. Past roles include leading a cryptocurrency exchange rewrite with TDD and GraphQL adoption, and implementing custom encryption and KYC flows—skills that blend security, reliability, and product-focused frontend engineering. Based in Seoul, he pairs deep performance optimization techniques (time slicing, lazy loading, batch updates) with pragmatic engineering that surfaces in measurable stability gains during peak trading periods.
11 years of coding experience
6 years of employment as a software developer
학사, 컴퓨터공학, 3.4, 학사, 컴퓨터공학, 3.4 at 서울과학기술대학교
Stackoverflow
126reputation
18kreached
8answers
0questions
Github Skills (97)
css-in-js10
styled-components10
security10
linting10
javascript10
gatsby10
static-site-generator10
eslint10
gatsby-plugin10
arrow-functions10
gatsbyjs10
naming-conventions10
css10
fullstack-development10
graphql10
Programming languages (8)
Github contributions (5)
wonism/get-notion-contents
Dec 2019 - Jun 2020
Get contents from notion
Contributions:25 commits, 2 PRs, 20 pushes in 5 months
contentsnotionnotion-contents
wonism/react-google-ads
Dec 2016 - Apr 2018
Contributions:8 commits, 1 PR, 7 pushes in 1 year 3 months
react-componentreactadsensegoogle-adsense
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