Debrief: Design

Debrief is a voice-first AI coach for the system design interview — the round that decides senior software-engineering offers at top tech companies. Built by an engineering leader who spent years as a VP of Engineering and on hiring committees at companies like Apple, Amazon, and Netflix, Debrief turns the part of interview prep you can't practice alone — a real, probing back-and-forth — into something you can run on demand. HOW IT WORKS • Start with a free level check. Talk through a short diagnostic and get an honest read on where you stand, from L4 to L7. • Practice full mock interviews with Kai, your AI interviewer. Speak your answers out loud, sketch your architecture on the built-in whiteboard, and get interrupted and probed the way a real interviewer would — clarifying scope, pushing on bottlenecks, testing your tradeoffs. • Get a written evaluation after every session: a rubric-graded report calibrated to your target level and company style, with the specific moments that helped and hurt. • Sharpen with focused drills and tutorials between mocks. WHY IT'S DIFFERENT • Voice-first and diagram-aware — designed for how the interview is actually conducted, not a chatbot. • Level-calibrated. The same answer is graded differently for an L4 and an L6, because the bar is different. • Feedback with real judgment behind it. The rubrics and probing come from someone who has sat on the other side of the table. • Your work is private. Sessions, transcripts, and sketches are yours; we never use your content to train models, and we run no third-party ad trackers. WHO IT'S FOR Software engineers preparing for system design / architecture interviews at FAANG and other top-tier companies — whether you're targeting your first senior loop or leveling up to staff. PLANS • Free: level check + baseline report + sample drills. • Practice — $49/month: 2 mock interviews per month. • Intensive — $99/month: 8 mock interviews per month. • Interview Sprint — $249 one-time: 12 mocks over 12 weeks, plus calibration re-checks. Best for an active interview loop. • Top-up — $25: 3 extra mocks. Subscriptions renew automatically until cancelled; manage or cancel anytime in your App Store account settings. Debrief is practice and feedback to help you prepare — not a guarantee of any interview outcome. You must be 18+ to use it. Terms of Use (EULA): https://usedebrief.com/legal/terms Privacy Policy: https://usedebrief.com/legal/privacy Questions? info@nbl.studio