I applied in-person. The process took 2 weeks. I interviewed at Trader Joe's (Millburn, NJ) in Sep 2012
Interview
had three interviews; and intital screening, a joint interview, and finally an interview with the store manager. was able to answer all questions before even asked. store manager was more focused on me working at a puppy store than my actual work history
Applied online and had one in person interview with the captain. It lasted maybe 10 minutes. Got a call a week or so later that I got the job. Very fast process.
It's two to three interviews, the final with the Captain (or highest manager) of the store. The interviews are largely to get to know your personality and how well you would do at customer service.
The interview process was absolutely wonderful! I didn't feel stressed or nervous and it felt like I was just chatting with a friend! Trader Joes is a great company and the interview was great.