Notification System

A scalable notification service built with NestJS, Prisma, PostgreSQL, Redis, and BullMQ.

Features

• Multi-channel notifications
  • Email
  • SMS
  • Push
  • In-App
• User notification preferences
• Delivery tracking
• Priority-based processing
• Queue-driven architecture
• Delivery-level retries

Tech Stack

• NestJS
• TypeScript
• Prisma
• PostgreSQL
• Redis
• BullMQ

Architecture

Notification API
        ↓
Create Notification
        ↓
Create Deliveries
        ↓
Queue Routing

email-queue
sms-queue
push-queue
inapp-queue

        ↓

Workers
        ↓

Providers
        ↓

External Channels

Status

Work in Progress

Current Progress

• Notification creation
• Delivery record creation
• User preferences
• Redis setup
• BullMQ setup
• Queue architecture design
• Queue routing

Next Steps

• Workers
• Channel providers
• Retry mechanism
• Dead Letter Queues (DLQ)
• Observability & metrics