the production readiness review
Don't draw the boxes. Prove they survive.
Design systems with real capacities and a real monthly bill. Defend your choices. Then watch our simulator send the traffic spike, kill the region, and grade what actually happened.
Pro is coming.
Every challenge format, unlimited AI Production Readiness Reviews, the full curriculum. Launch-list members get the founding price.
Design Challenges
liveGreenfield builds, on-call incidents, and systems that must survive 1k → 10M users. Defend every box you place.
Interactive Playgrounds
liveSkew a key distribution and watch the hot shard melt. Concepts you can break with your own hands — free.
Learning Tracks
liveCaching, sharding, replication, consensus — each lesson paired with a live simulation, not a static diagram.
Question Bank
live“Region B just died — what do your users see?” Scenario drills with spaced repetition.
Real-System Case Studies
liveStep through how real architectures evolved, simulate why each version fell over, then design it yourself.
Build Your Own
coming soonAn LSM-tree storage engine, an HTTP server — built stage by stage inside the curriculum.