I applied through college or university. The process took 2 weeks. I interviewed at Epic in Sep 2015
Interview
Applied at my university's career fair. I received an email to set up a phone interview. The phone interview was very relaxed and the engineer was easy to talk to. Basically just asked why I want to work at Epic and about projects I've worked on professionally, but none of the big projects I've done on the side.
Within 15 minutes of the phone interview I received an email to take their programming assessment.
I took the test the next day as there was no way to study for it. They used an online proctor program with webcam / microphone monitoring. In the first section they teach you about a new language and test you on it. This part can be tricky because their tutorial is not very specific and some of the questions were very much debatable. Unfortunately you don't get that opportunity, so pick wisely.
The next part of the test took me a little over 2 hours. It was 4 programming questions in a row and you are not allowed to use the bathroom (or do anything for that matter) because these questions are all in one section. Definitely keep that in mind when moving on with this section, as it made it very hard for me to focus towards the end and I could've done better if it weren't for this limitation. Nevertheless, I know I did fine in this section, but probably not as well as they wanted.
Though I did get rejected, I gave this interview experience a thumbs down because:
1) Even companies like Google understand that Java APIs and syntactical questions are online and it is impractical to test someone on how well they know a specific API. Epic seems to be especially different here, but that is my opinion.
2) The proctor set up was a little overboard.
3) Though I've been employed in development for years, I'm disappointed that the projects I've done in my free time meant little to nothing to them, though many of them were on my resume, I put a lot of time into them, they are online, and they did not try them out (I checked!). This is an application for an internship, not a full-time position. Let's be realistic here. Some of the most dedicated students are staying are spending their weekend nights and playing with technologies and building projects that are meaningful to them. I feel that you can learn a lot about a person from that.
I emailed them for feedback to improve on myself but have yet to receive a response.
If Epic is the only place you want to work my advice is to only on algorithms and data structures.
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.