Citadel ML System Design Interview Questions
Practice the exact questions companies are asking right now.
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4 Questions 1 Company
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Citadel
Medium
Data Scientist LockedStabilize LLM inference and estimate needed repeats
You run an LLM-based sentiment model to score a fixed dataset of texts. Because the inference API doesn’t let you set temperature (and outputs are sto...
ML System Design
0
0
Oct 9, 2025
Citadel
Hard
Software EngineerBuild models for housing and wind power prediction
Two-Part Machine Learning Take-Home Part 1 — Binary Classification: "Can Buy" vs "Cannot Buy" Given applicant and market data, design a binary classif...
ML System Design
0
0
Sep 6, 2025
Citadel
Hard
Data ScientistBuild a regression model for wind power output
Task: Snapshot Regression for Turbine-Level Power Prediction (Non–Time-Series) You are given turbine-level SCADA snapshots and concurrent weather data...
ML System Design
0
0
Aug 13, 2025
Citadel
Hard
Data ScientistDesign a time-series home-buy decision classifier
Take‑Home: Classifying Buy‑Now vs Wait Decisions in Housing Time Series Context You are given a monthly panel of regional housing and macro time serie...
ML System Design
0
0
Aug 13, 2025