First round was with a line manager over a phone. He asked me a several questions about my previous experience what I did and with technologies I worked on. He was really interested in API. This interview lasted for 25 minutes. Aftew phone interview I was invited to office for face to face. It took more than an hour and I was asked more technical questions to see if I really understand what I was doing. There was supposed be another interview with HR but because I had first at the beginning of December I meanwhile accepted another offer.