Silent Push Notification System

Architected a silent push notification system for iOS and Android platforms, enabling background data synchronization and app state updates without user interruption.

Integrated APNS (Apple Push Notification Service) and FCM (Firebase Cloud Messaging) with priority queues and retry mechanisms to ensure reliable delivery during peak traffic periods.

The system supports content-available pushes that wake the app in the background to fetch fresh data, keeping the app state current without requiring user interaction. This improved the user experience by ensuring data was ready when users opened the app.