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Although I majored in EE, I gradually realize that I prefer software programming, and especially emphasize the maintainability and scalability when developing large-scale project.

Eager to learn new things: I studied Kotlin, Java 8 and some advanced Git commands just for interest in my spare time.

Willing to study and share new techs with colleagues.

Although I majored in Telecommunications, my research subject is about Computer Vision and Augmented Reality. The goal is to detect an open palm in real-time video stream.

Thesis: hand tracking in real-time video (https://youtu.be/tCax5fFZlz0)

National Chiao Tung University

Final project of course Java: https://youtu.be/ggFMMHf8PzY

Senior Android Software Engineer

陳柏佑 (Owen Chen)

Cave Taiwan

Android Software Engineer

Android developer in a startup company

TODO

Development and maintenance of Grindr app, which is available on Google Play with 5M DAU.

* Functionality in chat room
-- Message rendering with custom view
-- Message loading, caching, paging
-- Jumping (scrolling) among paged messages
* Message searching using SQLite Full-text-search (FTS) and text tokenization, especially on a large database file (>500MB)

*Refactor:
-- Replace outdating ViewPager with ViewPager2 (with built-in right-to-left layout)
-- Convert RxJava to coroutine

*Bugfix:
-- Bugs about serialization
--- Serialize/deserialize the singleton of a sealed class
--- NotSerializableException when serializing a closure
-- Initialization for WorkManager

*Performance:
-- Improve DAO query time by 90% (100ms → 10ms)
-- Minimize overhead of thread-switching when using coroutine by 95% (400ms → 20ms)

=== 
Laid off because of the transition of management rights, all new-employed RDs are fired.

Grindr Taiwan

Mid Android Software Engineer

Development and maintenance of Asus in-house app: AsusGallery.

- Develop timeline page with zoomable layout: pure OpenGL, no any Android View (https://youtu.be/WBTgdrz7i4s)

- Integrate SAF(Storage Access Framework) into non-SAF code architecture (Including writing utilities classes and sharing with another in-house app)

- Improve and refactor interactions with SQLite (writing large structured data into databases, getting 5 times improvement: 800s --> 140s)

- Improve app cold-start launch time and speed of switching between pages

- Solve various bugs
 -- Removing Thread.sleep() from UI thread
 -- ANR related to GLSurfaceView and MediaCodec
 -- Deadlock resulting from nested synchronized blocks

- Cooperate with UI designer team (including writing an utility class and sharing with colleagues)

* My own utilities module (for debugging Android, implemented with Kotlin)
https://github.com/adherencegoo/XDDLib

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