The simulation engine is Rust compiled to WebAssembly - no backend required, runs entirely in your browser. Uses Discrete Event Simulation (DES) to model request flow at up to 100K RPS. Inject 28 chaos scenarios (cache stampede, node failure, network partition) and watch cascade effects in real time.

57 pre-built blueprints, including 5 MCP agent architectures with MCP-specific chaos scenarios. AWS cost estimation updates as you design. No signup.

Also built 28 in-depth system design interview guides — estimation, architecture decisions, narration scripts, follow-up Q&As for every common question: → syssimulator.com/learn

Technical breakdown of the DES + WASM engine with Rust source: → syssimulator.com/how-it-works

Built by two contributors: me, and Claude. The homepage is honest about this: 'Two contributors. One context window. No standups. No Jira. No regrets.'

Considering open-sourcing the simulation engine. Happy to answer questions about the Rust/WASM implementation — that was the interesting part.

Do give it a shot. I just tested jt looks crazy fun way to learn system design

Nicee! Bookmarked it

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