The interviews consisted of three parts: first a meeting with Michael Reinstein, the head of research department, who is a very skilled and experienced AI expert. It was an informal chat of around 1 hour, very friendly. Second part was a "homework" for both thinking and programming, quite nontrivial. There was a lot of space for creativity in this homework and I liked it (the topic was cloud detection in satellite images). The final meeting was another chat, clarification of expectations and a common lunch with other members of the research group. After all of that, I got an offer with a fair salary, which I accepted. One week later the offer was suddenly retracted with the explanation that "the company board has changed its short-term strategy and decided to stop hiring in the research department". This doesn't seem to be very professional, and also raises some questions about their revenues / stability / planing etc.

The whole interview process was a bit long and quite demanding. The first step was a more "informal" interview with HR and ML team lead. After this "screening" interview I was assigned a problem to work on at home with the completion deadline of one week. After I turned in my work I waited another week for the answer, and again after receiving an answer, I waited several days before having the final "lunch" interview. Overall count that the interview process will take 2-3 weeks + time to work on the assignment.