My Apps
2 apps I ship and maintain myself. Each one started as something I wanted to exist.
Pomodoro — Focused, Ticking Away
2025Live on App Store
Most focus timers bury the technique under features. This one keeps it plain: pick a length, start, and let the tick hold you to it. Work, short break, long break, repeat — no accounts, no dashboards, nothing to configure before you can begin.
Gia Phả — Family Tree
2026Live on the web
A genealogy viewer for Vietnamese families. Each member is a Markdown file; you load a .zip and everything is parsed in the browser — no backend, no account, nothing leaves your device. It draws the tree with d3, works out generations dynamically, resolves the notoriously intricate Vietnamese kinship terms, and reports statistics across the family.
Freelance & Consulting
Available for new projectsAlongside my own apps, most of my decade has been building iOS for other people's products — largely for the Japanese and Korean markets, plus startups that needed an app shipped before the runway ran out.
Japan & Korea
Long-running engagements with product teams in Tokyo and Seoul. Remote-first, async-heavy, and held to the review standards those markets expect.
Startups
First version to App Store, usually as the only iOS engineer. Scoping, architecture, release pipeline, and the pragmatic trade-offs that get a v1 out.
Team leadership
Led teams of 2–3 engineers, mentored juniors, and ran delivery in Agile/Scrum with cross-functional partners.
What I take on
- Native iOS builds in Swift & Objective-C
- Real-time video/voice features (Agora, WebRTC)
- Rescuing and re-architecting legacy codebases
- Performance, crash-rate and App Store review work
- Cross-platform delivery with React Native
Tech & Tools
Swift and Xcode are where I live — that is where the vast majority of my decade has gone. Objective-C still shows up in the codebases I inherit, React Native when a client wants one team instead of two, and the web stack when a side project calls for it.