Very technically based, emphasis on engineering first principles. Phone screen with HR starts technically and multiple rounds afterwards with engineers goes further in depth, both in random challenging brain-teasers as well as experience-based questions.
Interview questions [1]
Question 1
What is the coefficient of friction between a bicycle tire and pavement?
Pretty challenging - all technical and no behavioural questions, lots of software questions as well as hardware. Definitely have to prepare in advance to answer the technical questions. Don't expect any easy or basic questions.
It was a 30 minute phone interview with an engineering manager. It was generally a review of past experiences then two brain teaser questions. The interviewer was supportive and helped me through the brain teasers even when I was at a total loss.