An interactive study companion for Martin Kleppmann's classic on reliable, scalable, and maintainable systems.

Part 1: Foundations of Data Systems

Part 2: Distributed Data

Part 3: Derived Data

System Design Case Studies

Toggle sidebar

Designing Data-Intensive Applications

System Design Case Studies

Case 3: Designing WhatsApp

Low-latency messaging, delivery guarantees, offline users, and end-to-end encryption.

Requirements and Constraints

Section lesson

Back-of-the-Envelope Estimation

Section lesson

Delivery, Ordering, and Groups

Section lesson

Inspired by DDIA by Martin Kleppmann. Independent study companion — not affiliated with O'Reilly.