First round was a technical phone screen with a senior engineer followed by a second round technical coding challenge both via Google Hangouts. Was invited for an onsite a week later that lasted a few hours and spoke to several members of the engineering team. The problems were challenging but everyone was very supportive throughout the process.

An HR phone interview then A Coding Challenge followed by several video interviews including several BQ and Coding challenges. Not easy but the interviewer is really nice and helpful.