Coming soon

HLD Practice — architecture, at scale.

A full architecture canvas with Mermaid diagrams, traffic simulators, and SPOF detection. Currently in private alpha.

Design systems, not just classes.

The same workspace philosophy, scaled up. Sketch architectures with Mermaid, simulate traffic, identify SPOFs, and walk through a real distributed-systems interview with the AI.

Architecture canvas

Mermaid diagrams

Evolution timeline

Traffic simulator

// architecture.mmd

graph LR
  Client --> CDN
  CDN --> LB[Load Balancer]
  LB --> API[API Gateway]
  API --> Svc1[Order Service]
  API --> Svc2[Catalog Service]
  Svc1 --> DB[(Postgres)]
  Svc2 --> Cache[(Redis)]
  Svc1 -.-> Q{{Kafka}}