I started by taking a programming test, which was very open-ended. After passing that test, I was interviewed by their VP of Technology over the phone.

Following the phone interview and after the team examined my code, I was brought in for a four-hour in-person interview.

You interviewed with four people, each playing different roles within the organization (analytics, web development, backend development, etc.).

The first couple of interviews were straightforward. Everyone asked how I would solve common problems they faced (scalability, big data, ad hoc querying from billions of records, etc.). The last interview was more academic, and ultimately where I failed. It focused entirely on algorithm analysis, sorting, processes, heaps, etc.

It was a little disappointing, but overall a great experience. The people were really nice, and the environment was great. I would literally kill to work there.

You have 1000 computers. Each computer contains a text file containing 1 billion floating-point numbers. Design an algorithm or algorithms for extracting the top 1000 numbers from the entire list. Describe in detail how long it would take to process and why.