I applied online. The process took 3 months. I interviewed at Two Sigma (New York, NY) in Mar 2016
Interview
First I submitted the open coding challenge on Hacker rank. Then was asked for a phone interview and afterwards was invited onsite. They take really good care for onsite. Although I did not get offer, I liked the interview experience onsite.
Interview questions [1]
Question 1
The questions were a bit different. Not typical interview questions. They even asked me to debug one of their project to find bugs on it.
first interview was 60 minutes long with a leetcode hard question. second interview was 2 back to back 60 minute leetcode hard with emphasis on data structures. each interview had a 5 minute introduction and 10 minute at the end to ask questions
Standard medium difficulty hackerrank. The question involved decoded an encoded string. It was not something I had seen on LeetCode before and I think was unique to the company. The question was not that difficult but I ran out of time right before I could finish answering.
Interview questions [1]
Question 1
Decode a string encoded using a specific encoding algorithm.
It started of with one phone screen, then if you pass you have 2 back to back technicals, then 3 1 hour behaviorals, hiring committee, and management committee. Standard Leetcode and behavioral questions.