I had a great phone screen with an engineer from the team who was really passionate about the job. When I came in for an interview almost everyone seemed really excited about the position and engaged--except for one guy who seemed rather disinterested. I was annoyed that they didn't break for lunch. Pro tip: if the interview starts before noon and ends in the afternoon, provide lunch for the candidate. What really annoyed me though is that I didn't hear back from the recruiter for over a month. I sent a polite thank-you card to the hiring manager and recruiter and expected a little more consideration. I was told they'd get back to me within a week and it took over a month. At the very least just check in and let me know that you're looking at a few more candidates before making a decision.

HR contacted through mail and process took 2 weeks to conclude 4 rounds. all rounds were technical, although last round was Hiring Manager who was the director, unfortunately that round didnt go well. What bothered me most, HR just disappeared after last round, I had to reach out to her twice, and then she mentioned that not all rounds were positive, I am still waiting for detailed feedback, lets see if I get response.