I interviewed with two separate employees who were director level and above, and had reasonable chats, covering data structures and some brainteasers. But I also spoke with two managers who were outright hostile to the point of being just a little confusing. (Full disclosure: I botched a couple easier questions due to interview nerves, so maybe that affected how they acted). They asked about an area that I'm unfamiliar with, I admitted this, then they...looked at each other and laughed, and spent the rest of the time digging in in that area. It was honestly a touch more confusing than rude, because it was so far removed from what you'd normally see in a professional environment. They were also outright rude to the HR person that I was with, to the point that I felt a touch uncomfortable just seeing it. In any case, a company with employees that can't even pretend to be polite for a 30 minute chat? My advice is to stay far, far away.

The process started with a phone screening - mainly questions about my experience. Then I had a call with one of the company's engineers. I had to solve an algorithmic problem. I could not finish it in time but the interviewer told me this is not a problem, I can provide my solution later via email. After that there was an onsite interview separated in 2 main parts. One was with 2 managers, this one was a talk about the company's goals and my plans for the future. The other one was a technical interview where I had to solve a quite similar problem than I had in the first technical call. It went well until the point where one of the interviewees stopped me because he said this approach will not lead to the solution. So I tried with another solution, but after 2 sentences he told me this is not going to work either. He didn't justify that at all, just told me to search for another solution although I know my solution was correct. Then I went on with another idea which seemed better than the ones before, so the interviewee did not stop me this time, but after few sentences he told me again, that this is not the good track, so I should start over from the beginning. That was very frustrating, but I managed to solve the puzzle finally. After that they asked me some generic technical questions. In sum the onsite technical interview felt very hostile, malignant and in general negative, almost offensive.