I applied online. The process took 2 months. I interviewed at Two Sigma (New York, NY) in Feb 2016
Interview
3 parts. Online coding challenge, phone interview, than in person interview. All require a wide range of understanding including but not limited to data structure, efficient graph algorithms, and dealing with threading.
Interview questions [1]
Question 1
Dynamic Programming related questions are frequent.
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.