Began with a phone screen, a barrage of technical questions. Then the in person event, which they flew me out for. Took about five hours of total interviewing with a one hour lunch break. Rotating between engineers of different backgrounds, each asking about 2-3 questions which I'd explain on a whiteboard.

There were three milestones in the interview process. The first was an informal phone conversation to assess interest in the company and gain some clarification on the applicant's background. That was followed by a coding challenge that was delivered via email. And the last milestone was an on-site interview. That interview took about six hours long and consisted of some orientation on company benefits, business mission and organization, and technical interviews, which accounted for most of the six hours. The on-site interview also included lunch sponsored by the company.