I applied through university. The process took 3 weeks. I interviewed at Two Sigma (Houston, TX) in Nov 2015
Interview
The on-site interview is a day-long interview. You will go into interview afternoon if you pass the morning ones. There is three round of technical interviews in the morning which contains questions of algorithms and design pattern. I did both design on white board and program on computer. The questions may seems more difficult above average. Two of their employees took me to lunch. I was told I did not enter the afternoon round after the lunch.
Interview questions [1]
Question 1
Some "HARD" labeled algorithm questions on LeetCode
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.
