Citadel’s Quantitative Analyst Intern interview process starts with a 45–60 minute technical screen. This round focuses on problem-solving, including , basic statistics, and often live coding in coderpad (Python/C++), usually at a LeetCode-medium level. Interviewers care heavily about how you think, not just final answers. You’ll be expected to explain your reasoning clearly, handle follow-ups, and discuss edge cases.