Module 3 of 4

Scalable Systems

Make the jump from a well-structured monolith to a system that survives scale: service boundaries, distributed data, Redis, reliable queues, and idempotent consumers.

3 lessons

~12 hours

115 XP

Lesson 1advanced

Service Boundaries & Distributed Data

Decide when a modular monolith should become services, then handle the hard part: ownership, contracts, sagas, and consistency across databases.

240 min40 XP3 resources

Lesson 2advanced

Redis at Scale: Caching, Locks & Rate Limits

Use Redis for more than a cache: cache-aside, stampede control, distributed locks with fencing, rate limiting, and memory policies that do not surprise you.

210 min35 XP4 resources

Lesson 3advanced

Reliable Messaging: Queues, Outbox & Idempotency

Make asynchronous work survive crashes and retries: at-least-once delivery, idempotency keys, the transactional outbox, dead-letter queues, and backpressure.

240 min40 XP4 resources