First got a call from HR and was asked some basic engineering questions. After that got an assessment sheet to fill out with basic QC questions. Next phone interview was background and behavioral questions. The third phone interview was tough. Know your fundamentals (EE and ME) they WILL ask you random engineering knowledge questions. I got 2:3 "correct". They will also ask a brain teaser that I got right. I thought all the interviews went ok but they must have a 100% question correct criteria as I got the "we'll pass" email 2 weeks later. Entire process took about a month so settle in.

First interview was ~30 minutes, mostly talking about the salary and culture of working there. Some light technical questions like what is Young's Modulus and stuff like that. Second round was more about wanting to see how you think, they set up a test failure scenario and wanted me to walk through how I would figure out what the issue was/mitigate it in the future.