PRISM — Learn System Design

What it does

PRISM helps software engineers master System Design through interactive learning. Instead of memorizing architecture diagrams, you design real-world systems, simulate traffic, identify bottlenecks, and understand why architectures evolve. Learn with guided roadmaps, practice on an interactive canvas, and evaluate your designs with interview-focused feedback. Built for engineers preparing for System Design interviews and designing production-scale systems.

Build scalable distributed systems, simulate real traffic, find bottlenecks and cascading failures — before your interviewer does. Free interactive practice.

Explore architectural trade-offs, uncover bottlenecks, and understand why great systems succeed before those decisions reach production. PRISM simulates real consequences. Every design decision has a cost — PRISM shows you exactly what it is. Write throughput exceeded. Queries queue faster than they drain. One slow dependency drags down your entire response time distribution. Primary/replica gap grows under write load. Reads return stale data. Circuit breaker trips. Requests rejected at the edge. System unavailable. Drag real components — load balancers, caches, databases, queues — onto a blank canvas. No templates. No hand-holding. Just you and the system. Fire live traffic at your design.…from prismhld.com

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