Sean Mcquillan
Android Developer at Google
San Francisco, California, United States
Summary
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RockstarSean Mcquillan is a seasoned Android developer with 17 years of engineering experience, currently building text and UI features on Android at Google from San Francisco. He combines deep mobile UX work—shipping Jetpack Compose samples and MotionLayout integrations—with backend and testing expertise, having improved coroutine test tooling in the widely used kotlinx.coroutines library. At Remind he led cross-platform UX rewrites, drove adoption of testing to 80% coverage, and doubled chat engagement through data-driven experiments, showing a rare blend of product-minded design and engineering rigor. His background includes leading teams and high-performance backend work at BitTorrent and Twilio, so he’s comfortable across mobile, Python services, and performance tuning. Notably, he contributes to core Android and Kotlin projects, helping refine testing primitives like pauseDispatcher and advanceUntilIdle that benefit concurrent programming across the ecosystem.
17 years of coding experience
7 years of employment as a software developer
Github Skills (27)
asynchronous10
kotlin10
async10
testing10
android-test10
test-framework10
ui-design10
android-development10
compose10
android-developer10
material-design10
uid10
front-end-development10
android10
android-developers10
Programming languages (5)
Github contributions (5)
android/codelab-kotlin-coroutines
Aug 2018 - Jan 2020
Kotlin Coroutines codelab
Role in this project:
Mobile Developer (Android)
Mobile Developer (Android)Contributions:43 commits, 33 PRs, 44 pushes in 1 year 5 months
Contributions summary:Sean's primary contribution involves the initial project creation and scaffolding for a Kotlin Coroutines codelab, focused on Android development. They set up the basic structure, including build files and test implementations. Subsequent commits refined the project and refactored code, demonstrating an understanding of Android development principles. The user also implemented test helpers.
kotlin-coroutineskotlin-multiplatformcoroutineskotlincodelab
android/views-widgets-samples
May 2020 - Aug 2020
Multiple samples showing the best practices in views-widgets on Android.
Role in this project:Mobile Developer (Android)
Mobile Developer (Android)Contributions:29 commits, 19 PRs, 28 pushes in 3 months
Contributions summary:Sean primarily contributed to the `android/views-widgets-samples` repository, focusing on MotionLayout integration, and enhancing the user interface. Their work included implementing entrance animations, retaining instance state for the `Entrance` activity, and building a collapsing toolbar example. Furthermore, they also created a ViewPager integration, demonstrating the use of MotionLayout with ViewPager for interactive transitions.
androidwidgets
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