Hi, I'm Jiun!
Frontend Engineer · React Native & React
Introduction
I'm a frontend engineer who cares about DX as much as UX. I build cross-platform products with React Native and React, and write native modules in Swift and Kotlin when the platform demands it.
I work fluently with AI coding agents — I've used them in production since the early days and have taught teams beyond engineering how to use tools like Claude Code. I also contribute to open source, with merged PRs in Expo and astryx, Meta's open-source design system for AI agents.
Career
Nov 2024 - Present
Frontend Lead @ FutureworkLab
Shipped a health & habit-tracking app (JanuBit) to the App Store and Play Store as the first app engineer, integrating Apple HealthKit and Android Health Connect. Now building AXflow, an enterprise RAG document-AI platform, leading a Korea–Vietnam frontend team.
Jan 2024 - Jun 2024
Frontend Engineer @ Sneakers
Real-time hotspot sharing app — contributed to DAU growth from 1K to 10K, cut main screen load time from 3s to 0.5s, and automated weekly releases with Fastlane.
Apr 2023 - Jul 2023
Mobile Engineer @ Pawdlers
Pet-care startup — unified scattered core features into a dashboard main tab and built Instagram story sharing of user reviews with the Meta SDK.
Oct 2022 - Apr 2023
Researcher @ Gractor
Smart-city IoT dashboards — reduced map render time from 60s to 3s with Mapbox clustering and built data-visualization charts over 800K records.
Feb 2021 - Sep 2022
Mobile Engineer @ Lighthouse
Senior-care startup — built nursing home–guardian communication apps from the early days as the team grew from 5 to 13, and set up CI/CD with Jenkins and Fastlane.