Very informal. Started off with a phone interview as a pre-screen before taking the time to have me come in for a formal interview. I interviewed with a few people internally then 3 months later got called back in for another interview with more people. There was not a lot of direction or information over the course of this hiring process. There was not even a job description for what I was interviewing for. Could have been a very simple process, but the lack of information and communication made it very stressful. I felt like I was being strung along the whole time, and worried this was an indication of what it could be like in the company