A Red Hat recruiter (OK, "Talent Acquisition Specialist" :-) ) contacted me about this position. He explained that the interview process would probably take about three weeks due to the schedules of various involved individuals. I spoke with the manager who will be my direct supervisor first a couple of days after initial contact. He was very personable, and it was clear that they're looking for personality and cultural fit as well as technical expertise. A few days after that, I had a second phone interview with a senior architect where the questions became more technical, but it was still clear that wasn't all they wanted. Both of these interviewers were clearly very happy with their jobs and careers, and that was really exciting. In most cases, there would have been a phone call with the account exec that the position is to support (turns out I already knew him, so we skipped that part!) followed by an in-person panel type of interview, which we also skipped... apparently they were already satisfied that I was their guy :-) All in all, it was a very positive experience for me, and made me even more excited to join the team!
I had talked with Red Hat previously about a different role, which included more travel than I was comfortable with. Those who want to work with Red Hat should be aware that a lot of travel is likely to be part of the deal for some positions. Also, that last time, I had taken their HackerRank test, which is very similar to an RHCSA / RCHE exam. You will NOT be able to fake your way through that. Having a Red Hat certification in hand is very helpful, as they know what that means. And if you aren't really excited about Red Hat and have a certain basic amount of knowledge of their products, you likely won't make it far in the process. Everyone I've dealt with loves working here, and it's clear they're well taken care of. But that means they can afford to be picky.