I want to bring a dedicated Android e-commerce application from concept to Google Play. The core of the build is straightforward: customers must be able to browse products, add items to a cart, and check out smoothly—but the standout requirement is a robust push-notification system that keeps shoppers updated on promotions, order status, and cart reminders in real time. My priority stack is Kotlin with Android Studio, though I am open to proven cross-compatible libraries where it makes sense. Payment processing, user profiles, and basic analytics are already budgeted for the next phase, so please set up the project architecture with future modules in mind. Deliverables: • Production-ready APK plus signed AAB for store release • Complete, well-commented source code in a Git repository • Brief setup documentation covering build, API keys, and notification configuration Acceptance criteria: the app installs cleanly, first push notification arrives within five seconds of a test event, and checkout runs end-to-end in sandbox mode without errors. If this aligns with your skills, tell me how you would tackle the notification pipeline and any SDKs you prefer.