I’m looking to have a lightweight Android application built that can reliably send and receive push notifications. The core requirement is a clean, stable implementation of push messaging (Firebase Cloud Messaging is fine, but I’m open to other proven solutions if you have strong reasons). The interface itself can remain minimal for now—think a simple splash or home screen—because the priority is getting the notification flow working flawlessly in both foreground and background states, including when the app is closed. I’ll need the full Android Studio project, clear setup instructions, and a brief note explaining how I can update the notification payload later if needed. If you’ve shipped similar Android apps before and can turn this around quickly, let’s get started.