Interviewed at a conference, spoke with a current employer on a hardware team, showed her my resume and spoke briefly on some of my projects I have worked on. She then gave me an interview slot. It was very low stress and I got an offer.

Single phone interview with HR and recruiter. Single phone interview with a team of engineers asking past experience, what technology I was interested in, which one of my skills stood out the most, etc. After interviews you wait about a month to three months for response during background check and such and you will get an answer eventually. More often then not you will need to have the ability to get a clearance for positions with them and the investigations do take time.