HackerRank test (3 questions, 90 minutes), technical interview (one question that was easier than the HackerRank test) and a behavioral interview over about 4 weeks. During the behavioral interview I mostly talked about my projects. It was a surprisingly pleasant experience, I enjoyed working with both of my interviewers. The HackerRank test was fairly difficult, I only passed all the tests for one question, I had almost finished another, and there was one where I couldn't figure out a vital optimization technique at all. The technical interview question was much easier and it seemed like they were more intent on learning about my thought process for it.