I applied through both an internal referral and online. Shortly after we connected, I attended the phone interview.

I was asked a simple coding question, along with some machine learning and system design questions. The interviewer sounded impressed.

They arranged the on-site interview for after the Christmas vacation. It was at their NYC office and lasted from 10 am to 5 pm. About three interviews had two interviewers present; the others had one.

About three interviews in the afternoon were remote, conducted from their CA office. Most of the questions were system design-related to the products they're working on, which I felt were hard to prepare for beforehand and tricky to answer. Coding and algorithm questions were relatively few, but some were impressively difficult.

The entire process can be very tiring for several reasons:

• It lasts from 10 am to 5 pm.
• Most interviews require a lot of whiteboard writing.
• Their office in the Empire State Building requires authorization to pass between interview rooms and the restroom. In fact, I didn't go to the restroom between remote interviews because I couldn't find someone to hold the door for me.

I waited for several weeks and also sent follow-up emails, but didn't hear back at all. About four weeks later, I decided to call them directly and finally learned that I was no longer being considered.

For the on-site interview, most of the questions are system design related to the products they're working on. I feel these are hard to prepare beforehand and tricky to answer.

Coding and algorithm questions are relatively few, but some were impressively hard.