1st round with senior QR, to talk about resume
2nd round with HR.
Take home assessment to use market data to find alpha.
3rd round with another QR.
Rejected after 3rd round.
I applied through a recruiter. I interviewed at 3Red Partners
Interview
Somewhat standoffish / distracted interviewer. It was a coding / technical interview but it was clear he was doing it from his phone. Asked language-specific questions, very specific data structures (in the above language) questions, algorithms questions about numpy internals, and ds&a questions.
Interview questions [1]
Question 1
What is a closure, what is a decorator, how does multiple inheritance in python work
I applied online. I interviewed at 3Red Partners (Chicago, IL) in Jul 2025
Interview
Standard process with multiple rounds: phone call with HR, Zoom with traders, take-home coding challenge, Zoom with QRs, followed by an on-site. People were very professional with an academic mindset.
Interview questions [1]
Question 1
Consequences of the serial correlation of the error to regression coefficients. Python GIL.