• Architected and implemented a high-performance, cross-platform media delivery and rendering

platform for Activision Blizzard King supporting dynamic mixed-media ads (Video, HTML, GIF).

Featured with adaptive asset selection, parallel chunked download, and shared disk caching to

optimize large asset delivery across heterogeneous networks, driving 100%+ CTR increase and

4% global VCR lift over legacy GAM implementations

• SDK Performance Optimization: Engineered core SDK enhancements in Java, Kotlin, and Objective-C, directly improving ad rendering performance and user experience metrics across millions of devices.

• Mediation Ecosystem Management: Maintained and upgraded 3rd-party Mediation Adapters, ensuring 100% compatibility with global ad networks and reducing integration-related churn through proactive bug resolution.

• Market Expansion: Spearheaded the Android launch of PayPal "Pay Later" in Australia, implementing localized logic for a nationwide rollout.

• MVVM Migration: Led a large-scale refactor of the GPL codebase to MVVM, increasing modularity and improving developer velocity.

• Component Engineering: Developed a reusable Full-Screen UI component via Data Binding, standardizing design across multiple global flows.

• Code Health: Reduced technical debt by purging legacy feature flags and deprecated classes.

• Design System Integration: Contributed the end-to-end rewrite of the Search Overlay and Search Page to align with the "Cookbook" design system, optimizing suggestion logic and UI responsiveness.

• Component Engineering: Developed and contributed core reusable widgets (e.g., "Pill" widget) to the global design system, enhancing UI consistency across the platform.

• Feature Modernization: Refactored the Reservation Search module, simplifying the architecture to improve usability and maintainability.

• Developed an Android application of an E-commerce website with woocommerce RESTful APIs.

• Used MVP design pattern which can separate logic from activities and treat activities as View.

• Implemented the network calls with Retrofit and used Gson to process the json data.

• Handled time-consuming tasks such as network calls with Asynctask.

• Used Fresco to download and display images as well as generate thumbnails easily.

• Used thumbnail to reduce the loading time and made the APP running significantly more fluently.

Home page: techstep.io