Apr 2023 – Mar 2026 · 2 yrs 11 mos · Singapore · On-site

• UBS Mobile Banking App
• Owned end-to-end feature development using Jetpack Compose, delivering pixel-perfect, accessible UIs with Accessibility (a11y) best practices backed by StateFlow-based UI state management and unidirectional data flow (UDF).
• Led the migration of a large-scale legacy codebase of Gold feature to MVVM and Clean Architecture, improving code maintainability, enabling better separation of concerns, and enhancing scalability for long-term feature development.
• Built and scaled a shared Jetpack Compose component library, reducing duplicated UI code by ~30% and accelerating feature delivery by 25%.
• Implemented repository pattern and domain-driven design, isolating business logic into domain use-cases and models to prevent ViewModel and UI-layer leakage.
• Integrated backend services using Retrofit and OkHttp, defining REST contracts in collaboration with
• backend teams and managing local caching via Room and DataStore.
• Optimized app performance and responsiveness by reducing unnecessary recompositions, tuning Compose rendering, and profiling startup and runtime behavior, improving render performance by 35% on low-end devices.
• Diagnosed and resolved production issues to enhance app performance and stability, and achieving 99.89% crash-free sessions for 1M+ active users.
• Wrote unit and UI tests using JUnit, MockK, Turbine (Flow testing), ensuring reliable state-driven UI behavior.
• Conducted thorough code reviews, mentored junior engineers, and contributed to internal technical design documents (TDDs) and architectural guidelines.
• Collaborated closely with design, product, and backend teams to translate requirements into scalable, maintainable Android solutions with high visual fidelity.
• Tech Stack: Kotlin, MVVM, Coroutines, Flow / StateFlow, Jetpack Compose, Navigation-Compose, Clean
• Architecture, Multi-Module Architecture, Retrofit, DataStore, Dagger/Hilt, JUnit, MockK, Turbine, Azure
• CI/CD pipeline