Interview began with a screening phone call with the head of the department. Afterwards, I was given a programming exercise that took about two hours. It was of moderate difficulty. I think being prepared with an arsenal of dataframe-related tools helped. A couple of days later I was invited for an on-site interview. I had four one-on-one interviews that varied in difficulty. In the end, I would assess that I did really well in two, well in one, and in the other I did ok, as it was possibly the most difficult interviewee. Fortunately I was asked to provide list of references the next day. Two weeks later I received an offer. The whole process took about 4 weeks.