Two Sigma | Quant Finance | Phone Screen
Timeline: 2026(Jan - Mar) • Fulltime • NewGrad • 
Waiting for result
I recently had a technical phone screen for a Quant Finance position at Two Sigma. The interview lasted around 30 minutes. The interviewer started with a brief introduction about the company and its work culture. After that, we moved into technical questions.
The first question focused on probability, asking about conditional probabilities and Bayes’ theorem. I gave my explanation and worked through a couple of examples.
Next, the interviewer asked me to solve a coding problem on a shared editor. The problem was a variation of the ‘Two Sum’ problem where I was asked to find indices of two numbers that add up to a target value. I discussed my thought process while implementing a solution, using a hash map for optimal time complexity.
After coding, we discussed my approach and its efficiency. The interviewer asked a couple of follow-up questions regarding the space and time complexity of my solution.
To wrap up, I had the opportunity to ask questions about the team dynamics and what tools they commonly use. I appreciated the friendly atmosphere and left the interview feeling confident about my performance.
Interview Questions
Two Sum
Given an array of integers, return indices of the two numbers such that they add up to a specific target.
Difficulty: Easy | Reference: LC-1 | Tags: Array, Hash Table