It started well. I provided basic interface and a couple implementations for the problem in the order, requested by interviewer. Interviewer provided a couple of critique comments about me being inconsistent in terms of names for the classes. I fixed the code according to these comments. But when I tried to combine several implementations in a factory, interviewer asked to "not to write the mess" and I had no chance to finish my idea. At this point I explained that this is not polite to call someone's code "a mess" and decided not to proceed. It took 18 minutes to figure out that I would not want to work with this person.

There was a phone screen, a take home challenge, and then an onsite interview with three people. Overall questions were tough, but everyone was very nice, and made me think this was a challenging but friendly environment. The on site took longer than it was supposed to, it ran over by 1 hr.