Susquehanna International Group Quantitative Trader interview experience

The OA came first as a CodeSignal assessment with a time limit, focused on programming/algorithmic problems but strongly tied to test-style problem solving under pressure. After that, I moved into interview rounds where the emphasis stayed on probability and clean reasoning, with interviewers wanting me to explain how I thought rather than just land on an answer.

The math itself was built around classic probability and logic themes: Bayes’ rule showed up alongside combinatorics, expected-value style questions, and puzzle-like reasoning. The test had that familiar feel of getting