Rigorous and very similar to the likes of Google, Microsoft, etc. Started with a 3 hour onsite with the director of engineering. Standard behavioral and whiteboard algorithm questions. After passing this, I was asked to do a take home coding challenge to implement a REST client in any language of my choosing. After submitting my solution, I was asked to do another 5 hour onsite with 3 additional interviews, mostly technical, with some more behavioral questions.

Initial meeting with VP of engineering, coding test, then final round interview with the team. VP of engineering was candid & genuine, and everyone made me feel very comfortable. The team here is really solid- great bunch of people! The logistics of the commute/hours don't work for me right now, but otherwise this seems like it would be a great team to work with, and a company with a lot of growth coming this year.