It was 1 round. Started with them giving me a random topic 2-3 days before the interview, I needed to prepare a presentation on the given topic (they vary all the time). I have 15 minutes to present the topic and answer questions with the recruiter and a senior manager and then it went straight into an interview round. I think the interview lasted about 30 minutes, so say 45 minutes in total including the presentation. It's a competency-based interview, so the STAR technique is what they're looking for.