SpaceX Mechanical Engineer interview questions

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.