2 phone screens : One initial phone screen regarding previous work and background, another was basic technical phone screen with OO concepts and technical projects overview , Final face to face interview had whiteboard coding and discussion with 2 engineers and a manager.

One phone interview in which you are asked more behavioural questions. If you pass the phone screen you get an onsite interview (This is as far as I got). I would say that the interview was pretty much standard when it comes to a software role. They want to know if you know your subject matter, and how you behave in the interview. It's a small company so they need to make the judgement call.