[Shopping List] Task 6 – Reminder & Push Notification Service #70
Description
Epic
Goal
Implement reliable reminder scheduling and delivery for shopping lists using Expo push notifications so chefs never miss an order submission.
Deliverables
- Device token registration API and persistence tied to authenticated users/restaurants
- Reminder scheduler service (cron/queue worker) that invokes Expo push notifications and handles retries
- Optional local notification scheduling for immediate/reminder cues when the app is foregrounded
- Monitoring/logging for delivery success/failure, with alert thresholds
- Integration tests simulating reminder creation, update, and cancellation flows
Acceptance Criteria
- Reminders fire on both Android and iOS even if the app is closed
- Reminder updates/cancellations propagate without orphaned notifications
- Failure scenarios log actionable errors and surface fallback messaging to users
- Security review confirms tokens are protected and only used for authorized notifications
Notes
- Coordinate with backend domain task for data contracts
- Define retention policy for delivered reminders and audit history
- Ensure scheduler can scale with restaurant counts and respects rate limits