The process started with On Campus interviews at my school. I'm not sure how else one could apply for this position, as I couldn't find it on their website. They reached out to me after I RSVP'd through my career services center at my university. On campus interviews were fun and informative-- met with three different people.
A week later I was invited up to the SF offices for a full day of interviews at what they call the LinkedIn Invitational for College Grads-to-Be. They flew us up and hosted us overnight in a lovely hotel. The day of interviews was intense, but fun. The other candidates were from all over and incredibly sharp. I was in good company. We had an introduction, a tour, four rounds of interviews and a networking luncheon.
A week later, I received the offer. Overall, I was very impressed with the recruiting process.