
Jeffrey Chang
Android Engineer & Toolmaker
I’m an Android engineer. I’ve worked with Google, eBay, and startup teams, building mobile apps and maintaining the code behind them. I also build web applications and Python tools.
What I Work On
Android Development
Native Android apps with Kotlin and Jetpack Compose.
Architecture and Testing
Modular code, performance benchmarks, and tests that support ongoing changes.
Web and Python Tools
Small web applications and scripts for personal and operational tasks.
Outside Work
On the Trail
Completed Patagonia’s O Trek and hiked major sections of the John Muir Trail (Yosemite Valley to Bishop Pass).
Closer to Home
Long-distance running, cycling, cooking, and studying Chinese language and traditions. I’m an intermediate Spanish speaker.
Perspectives & Reading
I read about history, human behavior, and complex systems.
- Thinking in Systems by Donella Meadows
- Factfulness by Hans Rosling
- 1984 by George Orwell