I applied online. The process took 1 day. I interviewed at Two Sigma (New York, NY) in Mar 2010
Interview
Applied online, received invitation for HR phone interview about one month later.
Interviewer provided some background on the company and the areas for which I was interviewing, then asked a few basic questions about my reasons for seeking a new job, what I was looking to do, my salary history, etc.
Following the phone screen, the interviewer gave a two hour programming test consisting of two relatively straightforward problems to complete (the same problems other interviewees have posted in reviews).
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.
