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2 articles about Messaging.

11 min read·Feb 5, 2026

Designing a Notification System: Gateways, Queues, and Idempotency

Architecture of an enterprise notification system capable of sending millions of Push, SMS, and Email alerts. Covers message queues, rate limiting, and idempotency.

#System Design #Messaging #Architecture

System Design

15 min read·Jan 20, 2026

Designing a Chat System: WebSockets, Presence, and Message Queues

Explore the architecture behind messaging apps like WhatsApp or Discord. Covers WebSocket connections, online presence indicators, and message delivery guarantees.

#System Design #Messaging #Real-time