Hakjoon Sim is a Senior Research Engineer based in Seoul with 10 years of experience building front-end systems for automotive mobility and consumer services. He has driven UI and developer-experience improvements across major companies including Hyundai Motor Company and SK planet, shipping Next.js/React TypeScript frontends and contributing to large-scale projects like the Transmission BitTorrent client's web UI. His background spans embedded Android work at LG and SK Techx to cloud-deployed frontends with Docker and Nginx, giving him practical depth across device, web, and platform layers. Known for fixing tricky cross-browser rendering and layout issues, he blends attention to UX detail with production-ready engineering. He holds an MEng in Computer Engineering from Sungkyunkwan University and brings a pragmatically research-minded approach to mobility platform challenges.
10 years of coding experience
15 years of employment as a software developer
Master of Engineering - MEng, Computer Engineering, Master of Engineering - MEng, Computer Engineering at 성균관대학교
Official Transmission BitTorrent client repository
Role in this project:
Front-end Developer
Contributions:1 review, 8 commits, 10 PRs in 2 years
Contributions summary:Hakjoon primarily focused on improving the Transmission BitTorrent client's web interface. Their contributions include enhancing the developer environment, fixing UI layout issues within dialogs, and correcting rendering problems related to the overflow menu. Additionally, they addressed a Chrome-specific vendor prefix issue for mask rendering. These changes suggest a focus on improving the user experience and addressing cross-browser compatibility issues.
Contributions:7 releases, 96 commits, 2 PRs in 1 year 8 months
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Hakjoon Sim - Senior Research Engineer at Hyundai Motor Company