I applied online. The process took 3 weeks. I interviewed at SpaceX (Hawthorne, CA) in July 2022
Interview
Took 3 weeks (had to quarantine for 2 weeks or would've gone faster). Questions were difficult but good challenge. 1 initial screening, two follow-up phone interviews, one on-site interview/presentation. Team seemed like good, smart people. Whole process was very enjoyable. On-site interviews much more difficult, questions could be standard ones they ask everyone or completely random ones, more importantly they're looking to pick your brain and see how you approach engineering problems. You will either get a job offer before you leave on-site interviews or you'll be notified you didn't.
Interview questions [4]
Question 1
Standard ME questions (stress vs strain, parallel springs supporting mass, natural frequency, etc)
Multiple rounds of interviews ending with an all day onsite interview. Asked questions about background, classic textbook problems, and coworker interactions. Very technical and difficult. Lots of time spent trying to understand your thought process
Rigorous but fairly reasonable in my experience. The technical problems often has a twist but if you have strong fundamentals you should be able to perform well. The recruiter and interviewers I interacted with are all very nice people.
4 rounds, 1 with technical recruiter, 1 with engineer, 1 with manager, and onsite. first 3 are over the phone. onsite was the challenge, consists of presentation, one-on-ones, and tour.