2 long interviews + home assignment. I should have not agreed to this. The assignment took a whole week of work, I did research into areas I had no previous knowledge in to answer the questions, also they required careful design & implementation, they actually gave a positive feedback on the assignment, they invited me for follow-up interview. At the end they just responded with a general no. Probably because of no personal chemistry with recruiters, they didn't really give me a logical reason of why they won't hire me. They said the assignment was good in their opinion. They had a few small arguments on the design choices, but It just felt lazy and not willing from their side. I think they don't value their candidates' time.