Mobile Infrastructure: CI/CD, developer tools and developer experience solutions.

• End-to-end testing solution

  • Enhanced test stability by identifying and resolving infrastructure-related errors, achieving a near-error-free testing environment.

    Developed and maintained features for end-to-end servers to improve stability and performance; enhance troubleshooting experiences (ex. inspecting Appium logs, WebDriverAgent logs, pytest logs, screenshots, etc).

  • Ensured the availability of the in-house device farm by implementing service watchers and service recovery logic (for the farm).

    Monitored real devices in the device farm and resolved device related issues in time.

  • Reduced overall test execution time by orchestrating parallelized test pipelines, dynamically allocating resources based on device farm availability and task priorities.

  • Designed and implemented strategies to address test flakiness, including auto-detecting flaky tests, skipping them in critical runs, and benchmarking them for further analysis.

• CI/CD process improvement

  • Improved pipeline efficiency by migrating single-step Jenkins jobs to multi-stage pipelines, enabling parallel execution and stage retries.

Grab Driver: The ride-hailing app for Southeast Asian drivers.

• Spearheaded the successful implementation of the end-to-end testing solution within the tech family:

  • Reduced engineering effort significantly by leveraging Appium and Python to write tests once for both iOS and Android platforms.

  • Assisted QA engineers in seamlessly adopting the end-to-end testing infrastructure.

• Ensured robustness of the UI testing infrastructure:

  • Enhanced overall test reliability by introducing a sophisticated test quarantine logic to isolate flaky tests (read more: here).

  • Optimized test execution time on CI by implementing horizontal scaling, resulting in a remarkable 3x reduction in test execution time.

• Played a pivotal role in project build time reduction initiatives:

  • Developed and maintained the open-source CocoaPods binary cache, leading to a remarkable 55% reduction in project build time (from 18m to under 8m on average).

• Orchestrated the ingestion of crashlytics data from Firebase to the company's data lake, providing engineers with enhanced troubleshooting insights.

• Single-handedly managed critical CI/CD initiatives, ensuring seamless delivery of software products.

• Actively assisted engineers from other tech families with platform-related blockers or queries.

Portfolio apps: Branded apps for users to perform various actions on Bluetooth devices (trackers and smart watches). The apps support nearly 20 different languages (including RTL ones).

• Helped develop the core modules from scratch, took the major role in the features Activity, Sleep, Goal Tracking and Client-Server Data Sync.

• Helped increase the scalability by modularizing the code base into components (corresponding to 17 development pods). One project but able to build 7 different apps sharing the common core: Kate Spade New York Connected, MichaelKors Access, Emporio Armani Connected, Skagen Connected, DieselOn, Armani Exchange Connected, Chaps.

• Proposed and pioneered adopting MVVM as a solution for massive-view- controllers, making the business logic more manageable and testable. Besides, introduced and integrated ReactiveCocoa, helping the team implement asynchronous logic clearly, readably and maintainably.

• Incorporated frameworks Quick/Nimbler, MockingJay, Cuckoo to facilitate testing with less effort. Pioneered writing test cases for the core.

• Assisted new comers to straightforwardly get acquainted with the project by hosting technical knowledgesharing sessions and writing wiki documents.

Ticketbox: For users to discover events, book and manage tickets.

• Built the app at the early stage and successfully shipped it within 2.5 months, with the team size of 3 (1 iOS, 1 Android, 1 Designer). Maintained it till v1.0.8.

• Researched and partially adopted functional programming to make the code readable and elegant.

• Technology stacks: MVVM, ReactiveCocoa, Realm.

Ticketbox Event Manager: For organizers to manage events, make check-in procedures more convenient.

• Enhanced performance related to data syncing with server.

• Refactored and finally applied the same technology stacks with the Ticketbox user app to unify the code base of the 2 apps.