Beomjun Kim
Full Stack Engineer at Interview Booster
California, United States
Summary
👤
Senior🎓
Top SchoolBeomjun Kim is a Full Stack Engineer with 11 years of experience building reliable, user-focused web and real-time communication systems across startups and scale-ups. He helped grow SendBird from its early days, leading teams that designed and shipped robust WebSocket and WebRTC JavaScript SDKs, test suites with 95%+ coverage, and high-profile sample projects used by customers. Now based in California, he architects modern front ends and full-stack solutions using TypeScript, Next.js, React Native, NestJS, PostgreSQL/MongoDB and AWS, and currently drives the front-end of an AI-powered interview practice product. As a long-time freelancer and educator he has implemented production SDKs (Sendbird WebRTC), built an education platform, authored two popular React Native courses, and translated a serverless book into Korean—showing both deep technical craft and a knack for teaching. Comfortable as an individual contributor or technical lead, he thrives in autonomous, communicative teams and cares deeply about improving user experience. Outside work he’s an avid reader, coffee lover and soccer fan, a personal blend that often surfaces in pragmatic, well-tested engineering.
11 years of coding experience
7 years of employment as a software developer
Bachelor's degree Computer Science, Bachelor's degree Computer Science at Sejong University
English
Github Skills (9)
uid10
chat10
javascript10
front-end-development10
ui-design10
html9
css9
react8
uikit7
Programming languages (5)
Github contributions (5)
sendbird/sendbird-javascript-samples
Mar 2017 - Aug 2019
A guide of the installation and functions of Sendbird Chat, UIKit, and SyncManager for JavaScript samples.
Role in this project:
Front-end Developer
Front-end DeveloperContributions:65 commits, 4 PRs, 55 pushes in 2 years 4 months
Contributions summary:Beomjun primarily contributed to the web widget sample by implementing UI components and functionalities. The commits show the addition of features like the notification and chat elements, incorporating basic styling and layout changes. Furthermore, the user addressed design-related bug fixes, and incorporated sample versioning updates. These changes point to a focus on improving the user interface and overall experience of the widget.
reactleancloudchatjavascriptreactnative
Alchemist85K/my-first-react-native
Aug 2020 - Oct 2022
Contributions:31 commits, 26 pushes, 2 branches in 2 years 1 month
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