I applied through college or university. The process took 3 weeks. I interviewed at Epic (Madison, WI) in Dec 2015
Interview
There was a technical exam, including logical programming questions that could be answered in the language of your choice. That was followed by a phone interview, and then an onsite interview with other candidates (there were 10 or so in my 'batch' of people being interviewed that day). There was an emphasis on friendly interactions with the other candidates, and the overall environment was very causal (jeans and a polo would not have been out of place)
Medium level leetcode and then a very basic system design question as a final round interview. Overall, smooth and simple process. Only one technical and it was the first one.
Interview questions [1]
Question 1
How would you design a system to minimize wait time at a health care center?
First round is a thirty minute phone call with one of their developers. The other part of the first round is a three hour exam with IQ test style logic questions and coding questions.
[OA] OA was fair. Programming part are leetcode easy and easy-mediums, straightforward simulation, backtracking, dfs, strings, etc. No DP/graphs but ymmv.
[Final interview] (Case Study) I think the interviewer came up with their own prompt. It's mostly discussion-based, with a virtual white board. It's not too technical. I'm guessing its testing your communication/logical reasoning than system design skills. (Pair programming) 1 question, same format as the OA on the same platform, leetcode easy.
[Overall] Technical difficulty isn't bad. Interviewers who are current software devs seemed friendly. Had a good experience, yet got rejected.