I applied online and was contacted within a few days. The typical interview process involved a short phone call with a recruiter, followed by a one-hour technical phone interview with an engineer. This was then succeeded by a six-hour onsite interview.

The questions were not as difficult as I expected, though I may have been lucky and received a sequence of easier questions. The interview is also a test of endurance; by the end, I could barely think straight.

If you want to prepare properly, I would recommend one or two practice sessions where you complete five interview practice questions in a row. If you have a strong understanding of graph algorithms and fundamental data structures, I imagine you will pull through.

Also, make sure you can determine the Big O complexity of whatever code you write, as the engineers will ask for your analysis after you finish each question. I think I answered four out of five questions correctly at the onsite interview, so I did not receive a job offer.

I signed an NDA.