Master System Design Interviews with AI-native coaching
Generate HLDs, review architecture answers, practice interviewer follow-ups, and create diagrams.
No sign-up required · Free during MVP
HLD Generator
Produce a complete, interview-ready high-level design — requirements, APIs, data model, caching, async flow, failure handling, trade-offs, and a timed explanation script.
Open →Architecture Review
Paste your answer and get a staff-level score out of 10, with strong areas, gaps, over-engineering, and concrete senior-level upgrades.
Open →Mock Interview
Practice a live, one-question-at-a-time design interview that probes your answers and ends with a scored report.
Open →Diagram Generator
Turn a system description into clean Mermaid diagrams — component, sequence, dataflow, or state — with a live preview and copy button.
Open →Built for senior engineers
ScalaBrix is tuned for backend engineers, senior SDEs, staff engineers, and architects. Answers go deep on APIs, data models, caching, queues, consistency, failure handling, and the trade-offs interviewers actually probe — no shallow, generic checklists.