Over a three-month period, contributed to Android projects including team-berlin/Aflami and Amsterdam-Team/The-Cute-Tudee by delivering fifteen features and resolving critical bugs. Work included migrating UI components to Material Design 3, implementing sensor-based orientation, and refactoring category icon mapping for maintainability. Enhanced authentication reliability and search UX, introduced animated onboarding, and redesigned the profile interface with new assets. Integrated Firebase for analytics and crash monitoring, and improved image handling with SafeImageViewer. Applied Kotlin, Jetpack Compose, and Gradle to structure scalable modules, manage dependencies, and ensure robust error handling, focusing on code clarity, UI consistency, and maintainable software architecture throughout.