Product Design Engineering
Ace your next product design interview.
188 real interview questions from Apple, Google, Meta & Tesla. 7 rounds. 4 seniority levels. Built by engineers who've been on both sides of the table for 30+ years.
7
Interview Rounds
4
Seniority Levels
188
Unique Questions
30+
Years of Experience
How It Works
Your prep journey, step by step.
Follow this path to go from rusty fundamentals to interview-ready. Each step builds on the last.
Brush up your fundamentals
→Start here. Review beam bending, material properties, GD&T, tolerance stacks, manufacturing processes, and thermal engineering. Each topic has quick-reference formulas at the top and expandable deep dives below.
Pick your level and practice
→Choose the seniority level you're interviewing for — Junior through Principal. Then pick from 7 interview rounds covering partnerships, technical fundamentals, analysis, statistics, DFM, thermal/fluids, and system design. Each question gives you a realistic scenario and lets you practice your answer.
Junior
0–4 years
Senior PD Engineer
5–9 years
Staff PD Engineer
10–15 years
Principal
15+ years
Go back and forth with the AI interviewer
Each question has a built-in AI interviewer (powered by Gemini) that acts as a Staff/Principal Apple engineer. Type or speak your answer — the AI evaluates it, asks follow-up questions, and pushes you to go deeper. After 5 minutes it scores you 1-5 across the evaluation dimensions. Just like a real interview, you get 10 minutes max per question.
Check the evaluation rubric
→After practicing, review how you would be scored. The rubric shows exactly what separates a Strong Hire from a No Hire at your level — across all 7 rounds. Includes the 5 signals interviewers read for, the answer structure that works, and company-level mapping with compensation data from Apple, Google, Meta, Microsoft, Tesla, and NVIDIA.
Start with the fundamentals.
The strongest candidates are the ones who refresh their basics before walking into the room. Begin there.