Andhika Y.

Senior Android Developer | Kotlin & Jetpack Compose | Top Rated Plus

Top Rated Plus Mobile Developer with 11+ years of experience, 100% Job Success, and 1,400+ hours on Upwork. I build, modernize, and maintain production mobile apps for Android and cross-platform products using Kotlin, Java, Flutter, React Native, and Kotlin Multiplatform. Clients hire me to: - Build Android, Flutter, and React Native mobile applications - Connect cross-platform apps with native Android functionality - Modernize legacy Java or Kotlin codebases - Migrate XML interfaces to Jetpack Compose - Share business logic between Android and iOS using Kotlin Multiplatform - Integrate REST APIs, Firebase, authentication, and third-party SDKs - Diagnose difficult bugs, performance issues, and background-service problems - Add unit tests, improve architecture, and set up CI/CD pipelines - Build Android TV, Fire TV, kiosk, MDM, BLE, USB, and hardware-connected applications My Upwork work includes Kotlin Multiplatform migration, Android TV launcher customization, an Android parental-controls application, a Fire TV kiosk app, Jetpack Compose development, GPS background services, Google MDM configuration, and SDK integration. Core technologies: Kotlin, Java, Android, Jetpack Compose, Flutter, Dart, React Native, Kotlin Multiplatform, Firebase, REST APIs, Retrofit, Coroutines, Room, WorkManager, Gradle, Git, CI/CD, and unit testing. I am comfortable joining an existing codebase, working through incomplete requirements, and turning complex mobile problems into a clear implementation plan. Best fit: startups, product teams, and agencies that need one experienced developer for new mobile features, legacy-app modernization, bug fixing, or long-term maintenance. Send me your project brief, repository context, or bug list. I will tell you what I would investigate first and whether I am the right developer for the project.