Building Blocks

The infrastructure primitives you combine to build real systems — load balancers, caching, queues, databases, CDNs.

5 Lessons

Knowledge Course

Caching strategies for reducing latency and database load — Cache-Aside, Write-Through, Write-Behind, and eviction policies.

Content Delivery Networks — how edge caching reduces latency and handles global traffic at scale.

SQL vs NoSQL, replication, sharding, and choosing the right database for your system design.

How load balancers distribute traffic across servers — Layer 4 vs Layer 7, algorithms, and health checks.

Asynchronous communication between services — Kafka, RabbitMQ, SQS, and event-driven architecture.