First, I was contacted by a recruiter. I had a phone interview that was pretty much about my background.Then I had an online test that was quite difficult. The questions were completely different from popular tests like SHL. The test emphasised mathematics and the probability theory in particular. Some of the problems are really hard to solve if you do not already know the solution or at least an approach to the solution. Then I was inveted to 3 interviews. I was asked information about my background, some fit questions, but the bulk of the interviews was solving mathimatical and logical problems. After that I was invited to another series of interviews. I have taken only one by now. It was terrible because I had to solve probability problems while on the phone. It is very inconvinient to do that.