Intermediate → Expert · 275 chapters · 11 deep dives
Master System Design, one decision at a time.
A complete, interactive curriculum — from load balancers to consensus. Read the concept, see the architecture, defend the trade-off, then prove it with quizzes, failure drills and interview labs.
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Practice & labs
Active recall beats re-reading. Pick a mode.
Adaptive QuizMixed questions across every topicFlashcardsRapid recall of key definitionsFinal Exam50 questions, scored & timedInterview LabFull design walkthroughsFailure TrainingDiagnose broken systemsEstimation GymBack-of-envelope mathInterview FrameworkThe 7-step methodCapstone ProjectsEnd-to-end system designs
Your progression
Ten levels from foundations to interview mastery.
L1
0%Foundations
0/12 chapters
L1
0%Networking & Protocols
0/22 chapters
L2
0%Databases
0/33 chapters
L2
0%Caching
0/21 chapters
L3
0%Distributed Systems
0/21 chapters
L3
0%Messaging & Event-Driven
0/23 chapters
L4
0%Architecture Patterns
0/14 chapters
L5
0%Reliability & Resilience
0/21 chapters
L5
0%Security
0/23 chapters
L5
0%Observability
0/14 chapters
L6
0%Frontend System Design
0/22 chapters
L7
0%Design Systems
0/20 chapters
L8
0%Performance & Scalability
0/15 chapters
L8
0%Estimation
0/7 chapters
L9
0%Interview Preparation
0/7 chapters