Mobile App (Android & iOS)
Cross-platform mobile app with offline support, push notifications, and a Node.js backend with real-time sync.
What needed solving
The client had a web platform but no mobile presence. Their field team needed an app that worked offline, synced data when back online, and sent push alerts for time-sensitive tasks — all on both Android and iOS without maintaining two codebases.
How I solved it
I built a cross-platform Flutter app backed by Firebase. Offline-first architecture using local storage with automatic background sync. Push notifications via FCM with custom payload handling. A single codebase shipped to both stores within the agreed timeline.
A look at the product
Key Features
- Cross-platform Android & iOS from a single codebase
- Offline-first with automatic background sync
- Push notifications with deep link routing
- Firebase Authentication with social login
- Real-time data updates via Firestore listeners
- Optimistic UI updates for instant feedback
Architecture
- 01Flutter with BLoC state management for predictable UI state
- 02Firebase Firestore for real-time database and offline persistence
- 03Firebase Authentication for secure user identity
- 04FCM for push notifications with custom payload handling
- 05REST API integration for legacy backend data
- 06Fastlane for automated build and store deployment
Results & Outcomes
Shipped to both App Store and Google Play on schedule
Reduced app load time by 35% through lazy loading
Improved field team productivity by 50% with offline support
Push notification open rate of 68% — above industry average
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