Build, test, and optimize real-world system architectures. Learn by doing with interactive simulations of production scenarios.
Four simple steps to master system design
Define functional needs and non-functional targets like RPS, latency, and availability.
Pick from proven patterns like cache-first, global CDN, or DB-only architectures.
Define schemas, APIs, and capacity planning with real-time validation and hints.
Get scored feedback, share your design, and test it in the sandbox simulator.
Practice with production-scale challenges
Redirect requests within 100ms P95 at 5k RPS. Cache hot URLs and optimize for reads.