I had a very long series of phone interviews, I believe a total of 5 phone interviews over the course of a few weeks, one with an HR person and 4 with various engineers and scientists , including managers.. Last year when I had these interviews I was a Postdoc at a world famous scientific research laboratory (Los Alamos National Laboratory), they proceeded to insult me by saying that people at said national laboratory are lazy and don't do any real work. Persistently asked if I was comfortable working 65-80 hours a week.. One of the scientists performing the interview claimed he works 80 hours a week and said that is the expectation. I don't believe anyone does productive technical work for 80 hours a week. These people are extremely arrogant and insulting. I did not give a convincing yes answer to the question "are you comfortable working 80 hours a week consistently" in the final phone interview and got a rejection email the next morning.. Lots of fairly detailed technical "quiz questions" regarding what I had done in my PhD research and since then and various physics and electronics quiz questions.. These technical questions were much more detailed and difficult than those I had encountered in other interviews . I think I did OK with those, the problem was they were not convinced about my eagerness to work 11 hours a day 7 days a week, which seemed to be the expectation.. The people are so arrogant and insulting they seem to be full of insecurities.. A very strange interview process indeed.. I had so many phone interviews and they were so insulting and unpleasant I was rather annoyed with them for wasting my time when I got the rejection email, although not surprised..

7-8 rounds of technical interview with different team members each lasting around 1-1:30 hrs. The interview was over 3 days and online. Then the HR interview and final interview with the hiring manager.