I applied through college or university. The process took 2 weeks. I interviewed at Two Sigma (Houston, TX) in Oct 2015
Interview
1 round HR, 1 round Online Test, 1 round tech-phone, 3 rounds on site in the morning, and lunch, and failed and get back(if passed the morning, maybe some more rounds in the afternoon)
Interview questions [1]
Question 1
Some coding on computer, some sudo code on white board, Object-orient design, system design and bug tracking.
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.