Jonghyeon Ko
Frontend Developer at TanStack
Seoul, South Korea
Summary
🤩
Rockstar🎓
Top SchoolJonghyeon Ko is a frontend-focused software engineer based in Seoul with five years of experience building high-quality web experiences at Toss and other Korean tech companies. He maintains and contributes to major open-source projects—most notably TanStack Query (43M+ monthly downloads) and Suspensive—where he’s merged 100+ PRs and shepherded a library now used across 180+ internal packages at Toss. At Toss he improves developer experience and component quality, with hands-on work in React components, error boundaries, and TypeScript tooling. His background in visual communication design gives him a strong eye for developer-facing documentation and UX for libraries, which shows in his emphasis on JSDoc, examples, and DX improvements. Colleagues rely on him to bridge polished front-end interfaces with robust open-source tooling used at scale.
5 years of coding experience
4 years of employment as a software developer
학사, 디자인학부 시각정보디자인, 학사, 디자인학부 시각정보디자인 at 서경대학교
Korean, English
Github Skills (9)
typescript10
error-handling10
typescripts10
react10
typescript-types10
documentation10
javascript9
web-content8
webpages8
Programming languages (12)
Github contributions (5)
toss/slash
Oct 2022 - Jan 2023
A collection of TypeScript/JavaScript packages to build high-quality web services.
Role in this project:
Front-end Developer
Front-end DeveloperContributions:65 reviews, 43 commits, 55 PRs in 3 months
Contributions summary:Jonghyeon primarily contributed to the documentation and improvement of existing React components and utility functions within the `toss/slash` repository. Their work included updating JSDoc comments for better developer experience and adding examples to the documentation. The user also made a series of fixes related to the error boundary component, including adding features like `ErrorBoundaryGroup`, ref support, and improving the display name in development mode. They demonstrated a focus on enhancing the usability and maintainability of the library's components.
reactjavascriptweb-serviceshigh-qualityjavascript-typescript
manudeli/slash
Oct 2022 - May 2024
A collection of TypeScript/JavaScript packages to build high-quality web services.
Contributions:195 pushes, 50 branches in 1 year 7 months
javascriptweb-serviceshigh-qualityjavascript-typescriptjavascript-packages
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.