I applied online. The process took 3 weeks. I interviewed at SpaceX (Brownsville, TX) in Mar 2021
Interview
Phone interview with a hiring recruiter just asking about your basic qualifications for the job then moved on to an actual engineer who asks technical questions and asks about some projects you have worked on in the past
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
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.
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.