Production scale
Owned Android development for USCC Call Guardian (500K+ users) and later became the sole Android maintainer for Xfinity Call Guard (200K+ users) after its initial development by a larger engineering team.
Android engineer · Vancouver, WA
Android engineer building reliable mobile products at scale.
8 years building and owning Kotlin Android applications, from architecture and feature delivery through production reliability and Google Play releases.
8Years in mobile engineering
700K+Users across professional Android apps
99.82%Crash-free rate maintained
01 / Production impact
Built and kept running in production.
Production Android experience across USCC Call Guardian and Xfinity Call Guard, serving 700K+ users combined.
Reliability
Eliminated synchronization-related crashes and maintained a 99.82% Crashlytics crash-free rate.
Production debugging
Diagnosed a Firebase issue associated with backend costs tripling and delivered a hotfix within one week.
Ownership
Android technical design, feature delivery, PR approvals, production releases, and application reliability.
02 / Featured work
Working through unreliable connectivity.
How can users keep working without a connection while their changes synchronize safely later? JobTracker explores that problem in Android.
JobTracker
A personal Android engineering project built around a practical question: how can people keep tracking applications when the network disappears, then reconcile their changes safely later?
01
Work locally first
Room drives the UI; creates and edits update local data immediately with a pending sync state.
02
Synchronize when connected
Network-constrained WorkManager work sends pending GraphQL mutations and retries Apollo or I/O failures.
03
Make divergence visible
Version checks can surface a conflict for an explicit Keep Mine or Keep Server choice.
03 / Selected projects
Selected Projects
Mobile interactions, device capabilities, and collaborative development.
DripCheck
An Android app combining camera capture with Gemini-powered clothing and outfit analysis, connecting device capabilities, REST APIs, and a modern mobile UI.
SimplePiano
An interactive Android piano with a multi-touch keyboard, sampled audio playback, and sustain controls, exploring mobile touch and audio interaction.
Blade Gamblers
A fast-paced, physics-based arena game built collaboratively with Godot, with keyboard and mobile-friendly touch controls. Served as Lead Director & Developer, contributing to development and creative direction.
More Projects
Embedded systems and hardware explorations.
IMU Mouse
An Arduino project that translates accelerometer tilt into USB mouse movement, with calibration, smoothed sensor readings, and button-controlled clicking and dragging.
Heart Monitor
An embedded ECG project that captures and processes heart signals, displays live traces, and records data to an SD card for playback.
04 / Experience
Proven in production.
Eight years delivering mobile products—from Samsung retail experiences to consumer Android applications used at scale.
June 2021 – August 2026
Android Engineer
Owned Android development for USCC Call Guardian and later became the sole Android maintainer for Xfinity Call Guard after initial team development.
Xfinity Call Guard · View on Google Play
- Owned Android development for USCC Call Guardian (500K+ users) and Xfinity Call Guard (200K+ users), driving technical design, feature delivery, code reviews, releases, and application reliability.
- Improved the cross-device experience by designing and implementing settings synchronization with Google Sign-In and Firebase, preserving user preferences across devices and offline use.
- Expanded call-protection capabilities and app engagement through neighborhood spam blocking and deep linking, giving users more control over unwanted calls and direct access to relevant app experiences.
- Strengthened production reliability by improving background synchronization, resolving critical defects, and adapting to Android platform changes, contributing to a 99.82% Crashlytics crash-free rate.
July 2018 – May 2021
Android Engineer
Developed Android and React Native applications for Samsung, combining Kotlin engineering with interactive retail experiences.
- Delivered revenue-generating Android and React Native projects for Samsung, contributing to 2 flagship and 3 retail demo applications showcased in Best Buy stores nationwide.
- Built interactive experiences including S Pen canvas drawing, ExoPlayer media playback, and frame-based widget animations to showcase Samsung hardware and platform capabilities.
- Delivered pixel-perfect interfaces for Samsung retail demos, translating design specifications into polished experiences showcasing flagship devices to customers.
05 / Toolkit
What I bring to the build.
Mobile
Kotlin, Java, Jetpack Compose, Android SDK, Android Jetpack, Material Design, React Native (Samsung retail projects)
Architecture
MVVM, StateFlow, Coroutines, repository pattern, dependency injection, offline-first design
Data & platform
Room, WorkManager, Apollo GraphQL, REST APIs, Retrofit, Hilt/Dagger, Firebase, FCM, Crashlytics
Delivery
Android Studio, Gradle, Git, Google Play Console, production support, release ownership, cross-functional delivery
06 / Contact