One fairly quick phone screen with some basic area of knowledge questions.
A week after the phone screen commenced and in person interview for about 3 hours length. More in-depth technical questions from an SME including some what-if questions and one question which I told him he should be paying me for the answer because it was so real business case but I answered anyway. An architect also spend some time asking questions, mostly trying to gauge my enthusiasm for the task, I think. Met with the hiring manager who was mainly concerned with my personality to ensure that I would fit in on his team.