Contacted by HR first, then spoke to the hiring manager for a phone interview. After about one month, I was brought in for an on-site panel interview that took about 6 hours. Each panel interview was with two people for one hour. They mostly asked technical and behavioral questions. Interviews seemed pretty long and in-depth for an early career position. HR was extremely unprofessional and completely ghosted me after the on-site interview. All of my phone calls were completely ignored. I can take the hint, but it makes your organization look pretty disorganized.

Screening interview consisted of basic engineering questions, relating to stress strain curves and related equations mostly. I was also asked a bunch of questions about successes, failures, working on a team, a time when a member on a team wasn't performing, etc. At the end of the interview, he asked a problem solving question about a rope and a clock. It was a good question that I didn't have the "correct" answer for, but the "correct" answer doesn't seem like a great one. Mine was better actually.