I was contacted by a recruiter after posting my resume online and a phone interview was quickly scheduled. It was very low stress and I think the purpose was simply to weed out people that are obviously not what they are looking for. No difficult questions. After that I was invited for an on-site interview. They put me up in a nice hotel and set up dinner with a current Epic employee the night before. The interview day itself was imposing, but not unpleasant. I got a tour of the campus, took several assessments, participated in a case study, gave a quick presentation (which can be on any topic), and had a typical HR interview. I haven't heard back yet as it's only been a couple of days, but all-in-all the experience was a positive one.

Phone interview with someone in the role followed by aptitude based exam. After scoring sufficiently on aptitude exam, more recruiter interviews and on-site visit. The recruiter/phone interviews were fairly standard and aptitude exam is something you have to just go in blind to