Citadel Securities

A market maker with deep technology teams alongside its trading seats.

What the rounds test

Probability and statistics
C++ and systems, for engineering seats
Structured problem solving

Large firms run several distinct pipelines under one name. Reading which one you are actually in — trading, research, or engineering — decides what to prepare, and applying to the wrong one is a commoner mistake than failing the right one.

Options, Greeks & markets Trading brainteasers Probability & statistics Expected value & market making Mental math & estimation

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