Hilal Alsibai
Senior Staff Software Engineer at Meta
California, United States
Summary
🤩
Rockstar🎓
Top SchoolHilal Alsibai is a Senior Staff Software Engineer based in California with 14+ years building high-performance Android and mobile systems, now focusing on AI-enabled mobile experiences. He rose through engineering roles at Meta after leading Android development at Keepsafe, where he shipped core infrastructure for a 50M-user app including encrypted video playback and on-the-fly encryption. A prolific open-source contributor to notable projects like Litho, Flipper and Facebook’s TextLayoutBuilder and Shimmer, he improves rendering, debugging and native-loading workflows across the Android ecosystem. Hilal blends deep platform expertise with pragmatic product sense—balancing low-level fixes (e.g., Samsung-specific NPEs and native .so loading) with user-facing features and app-store growth. Known for refactoring legacy code into Kotlin and modernizing build tooling, he’s comfortable driving both architecture and hands-on fixes. He pairs a UC Davis CS background with a track record of shipping resilient, production-grade mobile systems at scale.
14 years of coding experience
14 years of employment as a software developer
Bachelor of Science (B.S.) Computer Science, Bachelor of Science (B.S.) Computer Science at University of California, DavisComputer Science, Computer Science at Diablo Valley CollegeComputer Science, Computer Science at Monterey Peninsula College
Arabic, English
Stackoverflow
1reputation
144reached
1answer
1question
Github Skills (34)
kotlin10
gradle10
sharedpreferences10
testing10
plugin-development10
android-development10
java10
javas10
jna10
native-library10
android10
build-automation10
android-ndk10
android-ui10
gradlew10
Programming languages (6)
Github contributions (5)
facebookarchive/shimmer-android
Feb 2018 - Jun 2022
An easy, flexible way to add a shimmering effect to any view in an Android app.
Role in this project:
Mobile Developer (Android)
Mobile Developer (Android)Contributions:4 releases, 3 reviews, 67 commits in 4 years 5 months
Contributions summary:Hilal primarily contributed to the development and maintenance of the `facebookarchive/shimmer-android` repository, focused on implementing a shimmering effect for Android applications. They updated the Gradle build files to newer versions and refactored the code to use Kotlin. The user also modified the shimmer layout to prefix attributes to prevent collisions and took in floats for relative width/height. Furthermore, the user rewrote the sample app into Kotlin, improving its functionality.
in-viewandroid-libraryandroidshimmeringandroid-app
facebook/TextLayoutBuilder
Nov 2017 - Aug 2020
An Android library that allows you to build text layouts more easily.
Role in this project:Mobile Developer (Android)
Mobile Developer (Android)Contributions:4 releases, 44 commits, 3 PRs in 2 years 8 months
Contributions summary:Hilal primarily contributed to the Android library `textlayoutbuilder`. Their work included fixing tests, adding a sample application, and addressing issues related to density parameters, including absolute size span handling. Additionally, the user implemented line height tests and addressed a potential NullPointerException related to Samsung devices. They also added justification mode support and addressed issues regarding line spacing.
layoutsandroid-libraryandroidkotlintextview
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