Get ready for a very long day. If you are dismissed at lunch, you didn't get the job. You'll have an hourish interview with multiple engineers, an hour-long presentation, and lunch. Normally at lunch, you're with younger engineers who will be truthful about what working at Mainstream is like. PSA: Don't do a thermal project unless you live and breathe thermo.

Three interview sessions. First a phone screening with recruiter, very simple. Second is a technical interview with an engineer, wherein a couple fundamental questions are asked. Last is an in-person interview, where they fly you out. The day starts with an initial one-on-one interview. After this, you give a 45(ish) -minute presentation plus questions. Next, you have two more one-on-one interviews, then go out to lunch with some younger engineers at the company. After lunch you go on a tour of the company grounds, and then you have two or three more one-on-ones. Each of the one-on-ones last 30-45 minutes each. Only a couple of the one-on-ones are very technical where they layout a problem and ask how you'd solve it. Overall, it was a great experience with a great company.