The AI interviewer that actually challenges you.
Practice GenAI, coding, system design, and behavioral interviews out loud — the AI challenges your tradeoffs and scores you on communication, not just correctness.
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No credit card needed. Sign in with Google and claim your free session to experience the platform.
Get an AI matched prep plan
Tell us your target role and company. Rubduck generates a curated path of GenAI, System Design, or Coding questions tailored to how top tech companies actually interview.
Jump into the hot seat
Face an AI interviewer that interrupts, probes your tradeoffs, and challenges your assumptions. It's fully spoken and timed to replicate real interview pressure.
Think out loud
Unlike silent coding tools, Rubduck grades your communication. Write your code and talk through your mental models as the AI listens.
Get actionable feedback
Receive an instant breakdown of your performance. Dive into a timeline of your transcript and code changes, pinpointing exactly where your answer wobbled.
Prep for interviews at
4 interview types, all spoken and graded
GenAI
LLM product design, RAG architecture, agents, evals & observability
System Design
Distributed systems, scalability tradeoffs, architecture under pressure
Coding
Algorithms and problem-solving spoken out loud, not typed in silence
Behavioral
Resume-grounded STAR questions tailored to your target company
Free — no signup needed
Try it — it's free
One spoken mock interview. Transcript-linked feedback. No credit card, no paywall. See for yourself whether it's worth your time.
Frequently Asked Questions
What is Rubduck?▾
Rubduck is an AI mock interview platform for software and AI engineering roles. It runs spoken, timed, and graded interviews — covering GenAI, system design, coding, AI/ML, and behavioral — and provides transcript-linked feedback so you can see exactly where your answer wobbled.
What kinds of interviews does Rubduck practice?▾
Rubduck supports GenAI interviews (LLM product design, RAG architecture, prompt engineering, AI agents), system design, coding under pressure, AI/ML domain interviews, and behavioral interviews grounded in your own resume. Every session is spoken and timed — not silent typing.
How is Rubduck different from LeetCode or other prep tools?▾
Rubduck requires you to talk out loud throughout the interview, just like a real interview. Most tools let you code silently — Rubduck replicates the communication pressure that trips up candidates in real loops. It also provides transcript-linked feedback that shows you exactly which moments hurt your score.
Which companies does Rubduck help you prepare for?▾
Rubduck's question bank and prep plans are built around how Google, Meta, Amazon, Microsoft, Apple, OpenAI, and Anthropic actually run their AI engineering interviews. Company-specific prep pages cover interview format, key topics, and interviewer tips for each.
Is Rubduck free?▾
Rubduck offers free mock interview sessions to get started. The question bank, learning modules, and interactive games are entirely free with no signup required.