I had a phone interview with the hiring manager. He set up 3 interviews with other 3 hiring managers. 2 technical and 1 behavioural interviews. I liked their questions, personality and discussions.

Got a screening call 3 months after applying. This was a straightforward interview with a few fluid mechanics/gas dynamics related questions. 2 weeks later I got a call for 2nd round, which had 5 video call technical interviews of 30 mins each (with VP, engineering director, etc.). 30 min slots felt too short for any meaningful discussion as some of the interviewers joined the call late. The hiring manager however seemed genuinely interested during the interview and interviewed me for 30 min extra. Interview questions were moderately difficult. They told me that I will hear back a Yes or No in a month's time. Seeing the interest shown by hiring manager, I was very optimistic about getting the job. But the hiring manager never got back to me. I emailed him TWICE to check the status of my application, but he didn't have the decency to reply. So overall, the experience was awful. I spent a full day going through the interview process, the hiring manager himself spent more than an hour on my interview, but he did not care to spend 2 mins to send me status update on the application.

Applied online. I got a phone call from recruiter after one week. The manager contacted me one week after recruiter called me. Then, the manager gave me an on-site interview one day after he called me. I went to the office and they gave me an introduction to the company's factory. The interviewer told me about their work, company.