Recruiter screen, technical screen, then four round on site (2 technical, one system design, one behavioral). Most interviews went well, except for one on site where the interviewer barely said anything and seemed uninterested.

I had a brief screening to cover my history and learn about the company. Followed up with a brief skype session a few days later for a more technical screening. They sent over a 3 question coding challenge via HackerRank. The first challenge was very easy, and shortly after reading the second challenge I had to step away from the computer. When I was able to get back to it time was up, I remembered the directions for the 2nd challenge so I wrote the code and sent it in an email to the person I was speaking with and explained the situation. After a week of waiting, I reached out again and got no reply. After another 2 weeks the recruiter that set this up tried to reach out and they got no reply either... They really should at least have the common courtesy to tell a candidate that they are not the right fit.