Consists of quite a few rounds (Interview with HR + team manager, Two Home Assignments - both to demonstrate analytical thinking and write a summary of findings, Assignment Presentation, Interview with Data VP) but altogether it didn't take that long (roughly a month or so). No tricky questions or overly technical assessments, rather focused on my thinking process and aptitude for analysis. Relaxed but professional, what I heard during the interview quickly convinced me that I want to work for this company.

Initial Skype interview with HR, very friendly and relaxed. Usual HR competency questions and a few personality based questions. Heard back a day after the interview, to schedule next round interview with Product Manager. The second round was also very relaxed, a bit more formal, but I really felt that the PM was interested in me and my past experiences. Third round was a two part homework/test, part 1 was SQL (core competency for the role) and part 2 comprised of more generic UI questions/suggestions about their product. Challenging but interesting task! Last round was with 3 team members, I'd say the toughest interview, but nevertheless still friendly and relaxed. In the end I didnt get offered the role as they went for someone whose past experience was more specifically relevant to the role.