Visualize. Design. Defend.
Align Your Architecture.
Survive the Chaos.
The definitive system design simulator for engineers at every level — Mid, Senior, and Principal.
Stress-test your architecture before you write a single line of code.
Web Frontend
Client / Origin
CDN
Edge
API Gateway
Edge
Worker
Compute
Worker
Compute
Redis
Caching
PostgreSQL
Databases
Interrogate before you build
The board stays locked until you've asked the right clarifying questions and uncovered the requirements no one told you about.
The Chaos Engine
A live, scenario-specific incident fires mid-build. Your architecture either absorbs it or it doesn't — no partial credit.
Defend your tradeoffs
A Staff Engineer cross-examines your final design before scoring it on Scalability, Resilience, and Cost.
Design anything, at any level
Type any system you can imagine, or start from a curated challenge — tuned to Mid-Level, Senior, or Principal difficulty.
Pricing
Free to start. ₹499/mo to go all in.
Every plan gets the full interview loop — clarify, architect, defend. Pro adds Principal-tier scenarios, Chaos Roulette, and 15x the monthly sessions.
Free
₹0
- 2 sessions / month
- Mid & Senior scenarios
- Curated tracks & Story Mode
Pro
Best for active prep₹499/mo
or ₹1,199/3 months, or ₹3,999/yr
- Everything in Free
- 30 sessions / month
- Principal-tier scenarios
- Chaos Roulette