Apply online, you hear back, usually by a phone call that they would like to do an in person interview. I saw the recruiting team at a college fair and connected with them from there. I followed up periodically trying to see if they were hiring or not.

HR called me first about the interview. Then department manager invited us for the site visit. Would have 3-4 sr engineer or manager interview you. No hard question. The process would take couple of months. For my case, it's 2 month.