Notification-Service

Build a Notification Service from Scratch — Part 3: Retries, Rate Limiting, and Monitoring

Part 3: Implement rate limiting per channel, dead letter queue for failed notifications, and monitoring with Prometheus metrics.

Build a Notification Service from Scratch — Part 4: Scaling and Deployment

Final part: Scale notification workers horizontally, implement batching for high throughput, Dockerize, and deploy to production.

Build a Notification Service from Scratch — Part 2: Queue and Worker System

Part 2: Implement Redis-backed queue with Celery workers for email, SMS, and push notification delivery. Build channel-specific dispatchers.

Build a Notification Service from Scratch — Part 1: Architecture and Database Design

Part 1: Design a multi-channel notification service architecture. Covers database schema for email, SMS, and push notifications with template management.