Nicholas Chum
Principal Technical Engineer at Sapphire Stream Technology
Markham, Ontario, Canada
Summary
👤
Senior🎓
Top SchoolNicholas Chum is a Principal Technical Engineer and Android specialist with 11+ years building AOSP frameworks, infotainment systems, and UX-centric mobile apps for carriers like General Motors (SiriusXM integration, Front/Rear Seat Infotainment) while leading Produkt Development LLC. He blends deep low-level Android expertise—IPC, runtime resource overlays, hidden AOSP integrations and anti-piracy mechanisms—with product ownership experience shipping large-scale in-vehicle streaming features and media frameworks. A fluent collaborator across global teams, he maintains a strong open-source presence (notably contributing security and integrity enhancements to the widely used Substratum theming engine with millions of users). Nicholas pairs hands-on engineering (Java/Kotlin, on-device APK tooling, CI/Gerrit workflows) with UX design sensibilities, enabling pragmatic solutions that bridge platform internals and consumer-facing experiences. Based in Markham, Ontario, he brings both startup founder grit and enterprise-grade discipline to complex automotive and mobile engineering challenges.
11 years of coding experience
15 years of employment as a software developer
International Baccalaureate & Cambridge IGCSE, International Baccalaureate & Cambridge IGCSE at Island SchoolChinese International School | 漢基國際學校Bachelor's degree Environmental Biology and Buddhist Psychology, Bachelor's degree Environmental Biology and Buddhist Psychology at University of TorontoBayview Glen Private School
English, Chinese, Chinese
Stackoverflow
76reputation
2kreached
1answer
0questions
Github Skills (10)
kotlin10
theme-development10
android10
security9
gradle7
gradlew7
windows6
sdk6
javas4
java4
Programming languages (9)
Github contributions (5)
substratum/template
Jun 2017 - Jun 2018
The official Substratum Theme Template actively updated by the team!
Role in this project:
Mobile Developer (Android)
Mobile Developer (Android)Contributions:3 releases, 11 commits, 27 PRs in 1 year
Contributions summary:Nicholas primarily contributes to the `Substratum Theme Template`, focusing on Android-specific code. Their work involves enhancing security, adding checks to prevent potential hijacks of the theme, and consolidating dependencies. They've also implemented measures to verify theme integrity and manage the user experience, including anti-piracy checks and dialog implementations. The commits demonstrate a focus on maintaining and improving the functionality of the theming engine.
updatedtemplate
substratum/interfacer
Jul 2016 - Feb 2017
Substratum's background service that runs functions that should run on a completely separate thread, now without root!
Contributions:51 commits, 7 PRs, 65 pushes in 7 months
background-serviceseparaterunsthreadroot
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