The actual interview is easy. But the correspondence between applicants and HR is terrible. The HR is not responsive at all and takes forever to hear back from them.

Interviewed by 3 different employees individually. HR, then mid-level engineer, then principal. The interview was pretty straight forward. They asked about me, my resume, work experience, and classes. projects in school. Mostly behavioral and little technical. Between the 3 - 1:1 sessions and touring the office, I was there about 1-2 hours. I interviewed back in August for a position that wasn't available until January/ February as they mentioned. They told me to wait a couple months before following up. I understood. Since August, I tried contacting HR through phone and email with no response. By October I was being patient because they did tell me to wait. By December into Jan and now Feb, HR still is ignoring my calls and I am still left with no response. As far as I know, I am still being considered. I would happily hear yes or no from the firm, but stringing me along for 6 months and ignoring any form of contact is very unprofessional. Disappointed at the firms actions (or lack of). Lesson learned: don't wait on a company's response, keep moving forward until you get an offer. I since accepted an offer elsewhere.