SpaceX Engineering interview questions

After applying online and submitting a employee referral I was contacted for a phone screening with HR representative and was set up for a technical phone interview for the same week. Technical interview lasted about 45 minutes.

Process took a little over a month. Submitted my resume both online and through a friend who is a full time employee. Got contacted for a phone interview a few weeks after applying online (about a week after sending my resume to my friend). Phone interview went well, nothing too challenging but a lot of detailed questions about projects on my resume. Didn't hear back for about 4 weeks, when they contacted me again saying I "might be a better fit for a different division" (I applied for stuctures, and they moved me to systems integration in avionics). Had another phone interview with this department. Similar interview style, a little more breadth and less depth of questions but overall same type of stuff. Didn't hear back for about 10 days so I sent a followup email. Got a call later that day saying I got the job.