I applied through a recruiter. The process took 2 weeks. I interviewed at Two Sigma in Sept 2016
Interview
The process was brief, there was a 3 hour online coding question, followed by an HR round. During the HR round we discovered that visa sponsorship would be an issue, and that they would not be able to continue the process. It might be worthwhile to check this beforehand, although I don't think of the coding test as time wasted; it was a confidence boost and I learned some valuable techniques during the preparation.
Interview questions [1]
Question 1
One question from graph theory, and one question about string manipulation and search.
It will be a phone interview first. They will ask you technical questions about probability/ statistics. The interviewer is friendly, but the question is not easy. The process is good.
Interview questions [1]
Question 1
There are 11 people, they want to make sure that every 6 of them can open a box. How many keys at least for each person should have? How many locks? (One key can only open one lock, but one lock can be opened by many keys)
I applied through an employee referral. I interviewed at Two Sigma
Interview
First round: multi variable time series modeling
Virtual Onsite: coding + research + talk about a paper you read recently + statistics foundations
Very likely failed in statistics foundations.
Need more serious preparations to get through the position.
Interview questions [1]
Question 1
First round: multi variable time series modeling
Virtual Onsite: coding + research + talk about a paper you read recently + statistics foundations
I applied online. The process took 1 week. I interviewed at Two Sigma (New York, NY) in Nov 2023
Interview
Two rounds of probability theory followed by two rounds of coding. The probability theory round were consists of some puzzles, counting and Markov chains. They focused on random walks induced by certain real-life questions.
Interview questions [1]
Question 1
I do not remember the exact questions but it was heavily focused on Markov chains.
