DesignIntermediate~25 min

Design Notification System

system-designnotificationpushmessaging

Problem

Design a large-scale notification system that supports multiple channels (push notifications, email, SMS, in-app notifications).

Requirements

Deliver 100 million notifications per day
Support push notifications, email, SMS, and in-app notifications
Per-user notification settings (channel selection, frequency limits)
Priority-based delivery (urgent, normal, low priority)
Notification template management
Delivery status tracking and analytics
Retry and fallback functionality

Constraints

Urgent notifications delivered within 1 minute
Normal notifications delivered within 5 minutes
99.9% delivery success rate
Notification suppression based on user settings (max 5 per hour, etc.)

Constraints

Urgent notifications delivered within 1 minute
Normal notifications delivered within 5 minutes
99.9% delivery success rate
Notification suppression based on user settings (max 5 per hour, etc.)

Your Answer

1. Architecture Overview

Minimum 100 characters (100 more characters)

0

2. Notification Flow

Minimum 100 characters (100 more characters)

0

3. Priority Management

Minimum 60 characters (60 more characters)

0

4. Retry Strategy

Minimum 80 characters (80 more characters)

0

5. Rate Limiting

Minimum 80 characters (80 more characters)

0

6. Scalability

Minimum 80 characters (80 more characters)

0

7. Monitoring and Analytics

Minimum 60 characters (60 more characters)

0

Answer Progress0 / 7 sections

Please fill all sections with the minimum character count

Model Answer

Submit your answer or click "Show" to view the model answer.