First there was an at home assessment, passing that there was a coder pad interview, and finally a full-day interview with multiple interviewers, various coder pad-style assessments, technical questions, and personality fit.
Interview questions [1]
Question 1
How would you map a function across multiple machines?
I applied through a staffing agency. The process took 1 week. I interviewed at Citadel (New York, NY) in Apr 2025
Interview
Head hunter reached out to me. I was set up with an internal recruiter to speak about scheduling and the process. Did an initial code assessment with a current employee. Interview processed ended there.
Interview questions [1]
Question 1
Write a python class that handles permissions and can be updated with a config file.
I applied through a recruiter. I interviewed at Citadel in Nov 2020
Interview
Phone screen, 1 technical phone interview, 3 technical Zoom interviews, 1 behavioral/case interview with sector data analyst, and 1 behavioral/technical interview with senior director. The onsite interviews were essentially replaced by the last 3 interviews specified above. Overall, the company takes a long time to get back to you between each round (minimum two weeks). The questions were generally split pretty evenly between Python and SQL and they really dive into the work you've done in your previous role.
Interview questions [1]
Question 1
-Lock combination BFS problem
-Find files in a file system DFS problem