I applied online through Boeing's job website. A week or two later I was called to set up an interview over the phone. For the interview I called the number given and was connected with 3 people who would be interviewing me. The interview was your typical structured interview focused on scenario STAR based questions. Overall it was an easy interview, just make sure you study as many STAR questions as you can. I found it helpful to search for as many potential questions as I could and type out my answers to them. Since a lot of there interviews are done by phone you can just read back what you typed if you are asked one of those questions.
From what I hear job offers usually take a while after the interview, but my situation was a bit unusually due to the fact that I was called later that evening and was offered the job. While the offer was fast, passing the background check took a long time, roughly 4 weeks. I was worried about passing a credit check because my credit rather sucks and this was a finance position. However, everything cleared and I was given the soonest start date available.