● Designed all key architectural decisions: MVVM with Clean Architecture, Repository Pattern, ViewModel + StateFlow for reactive UI. ● Implemented complex asynchronous workflows using Kotlin Coroutines with structured concurrency for SMS parsing, PDF processing, and API calls with retry logic. ● Optimized app performance: reduced expense entry time by 50%, resolved Jetpack Compose recomposition inefficiencies, optimized RoomDB queries. ● Integrated multiple REST APIs for real-time currency exchange with JSON parsing, error handling, caching, and offline resilience. ● Built responsive UI using Jetpack Compose and Material Design 3 with smooth transitions and pixel-perfect implementation. ● Conducted systematic code reviews, maintained test coverage for critical paths, and documented architecture decisions. ● Published app to F-Droid with 2,400+ downloads and 130+ GitHub stars.

● Developed system-level Android apps with deep understanding of Android internals, process lifecycle, system UI, and hardware abstraction. ● Owned full product lifecycle: requirements, architecture, development, testing, release, and user support. ● Resolved complex production issues including device-specific crashes, memory leaks, and OS version incompatibilities across diverse Android hardware. ● Managed a community of 1,300+ users, handling bug triage, feature requests, and iterative releases. ● Built and monetized a tiered release model (free + paid), independently managing distribution and announcements.