I develop and maintain Android applications from requirements through tested delivery. Work can include new features, bug fixing, Kotlin and Java modernization, REST API and Firebase integration, payments, push notifications, analytics, Google Play release support, and audio or video processing with FFmpeg. I can review an existing codebase, reproduce issues, propose a scoped plan, implement changes, and provide source code, build instructions, test notes, and documentation. I also support Python automation and API or data workflows when they are part of the mobile product. Every delivery is reviewed and tested, and client credentials and data stay within the agreed scope. Please share the repository or a reproducible sample, target Android versions, required features, API documentation, and deadline so I can confirm scope.