System Design: Pub/Sub Architecture Explained

In this video, we break down Publish–Subscribe (Pub/Sub) architecture, one of the most important messaging patterns used in modern enterprise systems. You’ll learn what Pub/Sub is, how it works, and why it’s a foundational building block for event-driven architectures, microservices, and scalable cloud systems. We’ll cover: What Pub/Sub architecture is and why it exists Core components like publishers, subscribers, topics, and brokers How messages flow through a Pub/Sub system Real-world enterprise use cases When Pub/Sub is the right choice — and when it isn’t This video is part of my Enterprise Architecture series, where we explore system design patterns used in real production environments. If you’re a software engineer, architect, or just getting into system design, this video will give you a solid mental model for Pub/Sub and how it compares to queues and other messaging approaches. 👍 Like, subscribe, and let me know in the comments which architecture pattern you want to see next.