I applied online. The process took 2 weeks. I interviewed at Fitbit in Nov 2015
Interview
spoke initially to one of their talent aquisition people and he asked some general questions which basically asked about my general experience, why I was looking, was I interviewing with other companies, would I be open to relocation, etc...
He then said I would talk to an engineer in a few days which he set-up. Then I spoke to a second engineer about a week later.
Interview questions [1]
Question 1
lots of detailed RF PCB design questions, lots of radio system architecture questions.