Citadel Data Scientist Interview Experience — Cold Applied, Wildcard Matching Live Coding, Rejected Next Day

Citadel·Data Scientist·Oct 2025
Technical ScreenRejectedmedium

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Published

Curated and edited by PracHub

Practice the questions from this interview

Explain factor leakage checks and IC/ICIR filtering
Stabilize LLM inference and estimate needed repeats
Match a string with wildcard pattern recursively

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