I applied online. The process took 1 day. I interviewed at Amazon (Logan Township, NJ) in Nov 2018
Interview
Apply online, show up at the event and the one day training and then you're on the floor. There really wasn't much to the Interview process. You applied online, you're picked, you show up with a dozen other people in the morning. Watch a presentation. Fill out some stuff on the computer, take a drug test and then you show up a few days later when you're told to, watch some stuff, fill out a easy written test, go to the floor, learn out to operate a pit, you're working
No interview at all, you go into the hiring center, take your drug test, fill out some preliminary paperwork, verify the building and schedule you want, your start date and that's it.
Not too bad pretty easy and straightforward, simple question surrounding handling and moving. Make sure you know basic safety rules as they will ask you, for example how do you carry heavy items.
Apply online, go to the on-site office for oral drug swab and ID picture. Start date is assigned once background check comes back. The actual start date will depend on how fast the check comes back but isn't normally delayed.