They described what they are looking for and then interview was 30 mins. Problem was it was so little time I could ask questions. When I asked if I could, I was told we have overrun and to email them the questions. I heard nothing back.

In total 5 interview. Deep technical questions. What was strange, no HR was in involved in these rounds.The interview was quite challenging. It lasted for 4 weeks. Initial response was very slow, after that was faster. The overall experience was fine. I would apply it again in the future.