I just finished a full interview sequence with Nest and thought it would be smart to recap my experience for the next candidate that comes down the pipeline.
While your travel & interview arrangement documents will all have the Google logo splashed all over them, Nest is a distinctive and separate part of the Alphabet umbrella company that owns both Nest and Google.
Unlike Google itself, where prospective employees have to pass a grueling & exhausting audition after which hiring managers fight over a group of successful candidates, Nest actually has you in mind for a particular role with a particular manager (usually the one with the greatest need).
If you pass your one hour long phone screen, here's how your interviewing day is likely to go: you'll first meet with the Nest recruiter for a few minutes who will hand you a copy of the folks you'll be speaking with. If you're lucky, the recruiter will also tell you a tiny bit about the background of each interviewer and what s/he is going to be focusing on (e.g. concurrency & memory management, cross functional, design & architecture, algorithms, etc.) The mix of people seemed pretty thorough: I talked to the hiring manager, at least two or three iOS guys (including a technical lead), and a sleepy UX designer who looked in dire need of a coffee infusion.
My interviews were done in a meeting room in the front of the building (I thought it was a bit hilarious that the thermostats on the wall were not Nest devices) and I never got to get a close look at the actual working environment. Peeking in the narrow glass windows of the doors to the office space, I could see a huge open plan working environment with long tables. I.E. potentially no privacy or easy way to concentrate on work?
Currently, the mobile team all sits in the same area but this is very likely to be changing soon as they might be splitting / refactoring teams up to be divided across functional groups (such as thermostat, smoke alarm, DropCam, etc.).
Try to arrive a little early: parking in the complex, especially mid-morning, is a complete clusterfutz and chances are high no spots will be available. Drive up to the center of the campus (building 1, where your interviews will be) and simply use the valet.
Unlike previous antagonistic interviewing experiences at the main Google headquarters, I really felt that almost all of potential co-workers were friendly, welcoming, receptive and collaborative. And while I walked out of the office feeling actually upbeat about my chances, my dreams of getting to work at Nest were quickly smashed two days later when I got a standard "we've decided not to move forward" rejection e-mail (with the traditional no constructive feedback or detail for me to consider and work on). I initially figured the poker-faced hiring manager (who I worried was going to be a uninspiring boss to work under) was the vote against me, it also could have been the new grad algorithms guy (I wasted way too much time trying to wrap my head around the last, hardest problem he threw at me).
Hopefully my experience flunking the Nest interview will help you to prepare to pass your interviewing day. If you find any of the information in my interview review helpful, please let me know by voting "Yes" on the "Helpful?" question below (this helps to motivate me to be as detailed as possible).