Alexander S.

Senior Android & Kotlin Developer | Kotlin Multiplatform | Jetpack Compose I'm a Mobile Developer with 7+ years of experience building and maintaining production Android applications used by 100K–500K+ users. I help startups and businesses build reliable, scalable mobile apps — from MVPs to products. Whether you need a new application from scratch, modernize an existing codebase, improve performance, or add new features, I can take ownership of the entire development process. What I can help with • Android app development (Kotlin, Java) • Jetpack Compose UI development • Kotlin Multiplatform (shared Android/iOS business logic) • App architecture (MVVM, MVI, Clean Architecture) • Legacy code modernization and refactoring • Performance optimization and bug fixing • REST API integration • AdMob, Google Play Billing, subscriptions, and in-app purchases • Firebase Analytics & Crashlytics integration • Bluetooth, Wi-Fi Direct, WebRTC, and Android Auto • Computer Vision with MediaPipe Technologies Languages: Kotlin, Java, Coroutines Android: Jetpack Compose, Android SDK, Room, SQLite, WorkManager, Navigation, Material Design Architecture: MVVM, MVI, Clean Architecture, Modularization Networking: Retrofit, OkHttp, Ktor, REST APIs Dependency Injection: Hilt, Dagger 2, Koin Testing: JUnit, Mockito, Espresso Cross-platform: Kotlin Multiplatform (Android/iOS), Flutter Tools: Git, Gradle, CI/CD Why clients work with me • 7+ years of commercial Android development • Experience delivering apps from concept to Google Play • Strong focus on clean, maintainable, and scalable code • Clear communication and reliable delivery • Comfortable working independently or as part of a distributed team If you're looking for an experienced Android developer who can quickly understand your product and deliver high-quality solutions, I'd be happy to discuss your project.