Master system design interviews
through fundamentals, not templates
Answer any design question with confidence through deep understanding of core principles.
📚Depth Over Breadth
Master core concepts with spaced repetition. Build long-term memory, not short-term cramming
⚖️Trade-offs Over Templates
Learn when to use each pattern with trade-offs, failure modes, and real production insights
✏️Practice with Feedback
Draw diagrams, get instant evaluation. Practice real FAANG problems with detailed feedback
33 Topics. 200+ Concepts. 3000+ Cards.
Complete system design and ML system design interview coverage
Design FundamentalsNetworking & ProtocolsDistributed Systems PrimitivesReplication & ConsistencyPartitioning & ShardingCachingLoad BalancingDatabase DesignMessage Queues & StreamingRate LimitingSearch & Ranking SystemsGeospatial & Location ServicesObject Storage & Blob StorageData Processing PatternsBig Data SystemsResilience & Service PatternsOS & Systems Fundamentals
