AI changes every month. Your prep tool is stuck in 2022.
GenAI questions, AI-assisted coding rounds, spoken reasoning under pressure — Rubduck practices the interview that exists today, not the one you've been grinding for.
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Five steps. From sign-up to a sharper you.
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Prep for interviews at
7 interview types built for how top companies hire today
AI-Assisted Coding
NewGoogle, Meta, and others now let you use AI during coding rounds. Practice exactly that — writing prompts, steering the output, and explaining the result to your interviewer. The test isn't the algorithm anymore. It's whether you can use AI without looking like you're just copy-pasting.
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
Data Engineering
Pipeline design, data modeling, batch vs streaming trade-offs, and failure handling
Data Analytics
Metrics design, business case analysis, A/B testing, and data-driven recommendations
vs everything else
LeetCode trains silent coding. Interviews test out-loud thinking — and now AI use too.
Free — no signup needed
Pricing
Start free. Pay when you need more.
Try it — it's free
5 free sessions included — no credit card required. Practice AI-assisted coding rounds, spoken interviews, and get transcript-linked feedback.
Frequently Asked Questions
What is Rubduck?▾
Rubduck is an AI mock interview platform for software and AI engineering roles. It offers AI-assisted coding rounds — where you practice using AI tools the way companies now allow — plus spoken, timed, and graded interviews covering GenAI, system design, coding, and behavioral. Every session gives you transcript-linked feedback so you can see exactly where your answer wobbled.
What is an AI-assisted coding interview?▾
Many top companies now allow candidates to use AI tools like Copilot or ChatGPT during coding rounds. The test is no longer just whether you know the algorithm — it's whether you can direct AI effectively, understand the output, and explain your reasoning to the interviewer. Rubduck's AI-assisted coding rounds simulate exactly this environment so you can practice before the real thing.
What kinds of interviews does Rubduck practice?▾
Rubduck supports AI-assisted coding rounds, GenAI interviews (LLM product design, RAG architecture, prompt engineering, AI agents), system design, coding under pressure, AI/ML domain interviews, behavioral interviews grounded in your own resume, data engineering interviews (pipeline design, data modeling, batch vs streaming), and data analytics interviews (metrics design, A/B testing, business case analysis).
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 gives every new user 5 free AI mock interview sessions — no credit card required. After that, you can get 10 more sessions for $19. The question bank and learning modules are always free with no signup required.