I first had a call with the recruiter, who scoped my background and interests and decided which stream within software engineering my application would be placed in. Since I'm more of an interactive, client-side person, I chose Software Engineering - Frontend.

Had an hour-long phone interview with a frontend engineer. They started with general CS and systems questions, went deep into Java (threads, deadlocks, VM, garbage collection), and ended with some challenging JavaScript questions that required knowledge of JavaScript patterns.

About a week later, I got a call saying I had made it and they were flying me out to Mountain View for the on-site rounds, 'INvitational'. I chose a convenient date.

On their campus, I learned that LinkedIn holds 'INvitational' for entry-level candidates. It's basically one whole day of interviews and events with their selected set of candidates. The day started with breakfast, icebreakers for all the interviewees, and an inspirational talk by a senior manager. After warming up, two hour-long interviews were scheduled, both with experienced engineers. One was on algorithms, with concepts only from standard books like CTCI, and the second was a web-module development test, where I was shown a certain part of their site and had to write the structure, style it, and code the logic. The main thing is to talk through your approach.

After the first two rounds was a long tour of the campus, lunch, and a talk with recently joined engineers about their experience. I spent 2 hours here, but it helped calm me down.

The final two rounds came after. One was with a very experienced engineer, who showed me a new UI feature he was implementing on his work laptop, and I had to try and code that up. I stumbled a lot here, mainly because I didn't know how to implement each feature for all browsers/devices. The last round was a manager interview, in which I had to talk about system design (CTCI-esque) and later about my work experience and work style, probably to determine a culture fit.

The day ended with all of us candidates and a few recruiters going to a nice sushi place with tons of options. LinkedIn surely keeps you well-fed.

Develop a module on the actual site, keeping in mind the concepts of graceful degradation and supporting all users.