Designing systems that scale

System Design Interview

Learn how to architect scalable, reliable distributed systems — the kind that power real products at scale.

3 articles· read in order

Introduction to System Design

What system design is, why it matters beyond coding, and how to approach designing large-scale systems from first principles.

Scalability

Vertical vs horizontal scaling, stateless vs stateful services, and how to reason about growth before you hit the wall.

Load Balancing

How traffic is distributed across servers — algorithms, health checks, Layer 4 vs Layer 7, and what happens when a node fails.