The process took two months.

First, there was a phone interview. I passed after some basic "check if you have a pulse" coding questions. I was given an avalanche of study material and scheduled an onsite interview 1.5 months later.

During the onsite, there were interview rotations. Some were technical, others were brainstorming sessions. Lunch was just a chill, hang-out session.

Some interesting notes:

• The interviewers were just note-takers; they did not have any say in the interview process.

People were friendly, and the overall experience was positive. It just took too long.

I was asked about:

• A shortest path algorithm with a tweak.
• Implementing a function stub for writing to flash in C.
• Brainstorming ideas for a Nest product (I guess they try to get ideas from interviews).

No great philosophical random questions were asked.