System Design
Explore how real-world architectures evolve, or build your own and evaluate its bottlenecks.
Design Fundamentals
28 chapters covering scaling, consistent hashing, rate limiters, real-world system designs, and more from Alex Xu's System Design Interview.
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Scaling Simulator
Watch real-world architectures (Netflix, Instagram, Uber) evolve from 10 to 10M users. See how bottlenecks force architectural shifts.
Open Simulator
Sandbox Canvas
Build your own architecture from scratch. Drag and drop components, wire them together, and see real-time bottleneck analysis.
Open Canvas