The process began with a 20-minute phone screening with their hiring manager. It was pretty straightforward, just talking about my qualifications and why I applied. After that, I had three back-to-back in-person interviews, all on the same day—one with the supervisor, one with his partner, and one with one of the engineers. This all took about two hours. The first interview—the one with the supervisor—was the longest, and the most difficult, though it still wasn't the hardest interview I've had. It was rather structured, with the interviewer asking questions from a list. Most of them were all the "top ten most common interview questions" you'll see in a Google search, but there were one or two tough behavioral questions as well. I think one of them was "Tell me about a time you looked at data to come up with ways to improve efficiency." (This question was specific to the job description.) Also, he asked a lot of questions that were basically just variations on "What are your strengths," which unfortunately led to me running out of answers. So make sure you come up with a lot of different answers and work-related anecdotes for each common interview question.