Free guides
Two workbooks, 25 questions each. Every question comes with the answer most candidates give and why it fails. They're free: leave your email and the download appears.
Top 25 LLM System Design Interview Questions
25 LLM system design questions from senior and staff interviews for ML, LLM and AI infrastructure roles.
55 pages, 25 questions, November 2025.
What's insideTop 25 ML System Design Interview Questions
A guide to the pitfalls in ML system design: 25 questions in 6 chapters, from loss functions to feedback loops.
207 pages, 25 questions, 2025.
What's inside
The long versions are the books: every number derived in front of you.