The interview process consisted of 3 rounds: 1. Phone Interview (approx. 40 min.), 2. Skills Assessment (approx. 4 hours), and 3. Final Interview (approx. 4 hours). During the phone interview, you chat with a software developer at Epic. It's a very general conversation, with no specific technical questions (e.g. algorithm problems). You just talk about your experience programming, including projects you've worked on. The skills assessment is quite long. This one is very technical, with 4 sections: 1 for math problems, 1 for general intelligence questions, 1 to learn and apply a new programming language, and 1 to solve algorithm problems (I estimate they'd rank as easy on Leetcode).