Career / All firms / Citadel Securities
Citadel Securities interview preparation
Market maker · Miami, USA
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The process
Reviewed November 2026
Quant trading and research online assessment
Online assessment, reported by candidates and guides
timed numeric, 30 min, 15 questions
- Probability and statistics Probability, Statistics, Expected value, Combinatorics, Estimation
Some candidates skip the OA and go straight to a first interview. Some guides also mention a mental arithmetic speed test for QT.
Software engineering coding test
Online assessment, reported by candidates and guides
coding, 70 min, 2 questions
- Coding problems Coding, Algorithms
Duration reported as 70 or 90 min.
Phone screens
Phone screen, reported by candidates and guides
live interview
- Quant phone screen Probability, Statistics, Brainteasers, Mental math
- Engineering first round Coding, Algorithms, Behavioural
Usually 2 screens reported for QT. Official engineering page (not loadable, Cloudflare) is cited by search snippets as a 45-min remote first round.
Final round superday
Final round, reported by candidates and guides
live interview
- Quant interviews Probability, Statistics, Expected value, Brainteasers
- Engineering interviews Coding, Algorithms, System design
- Fit Behavioural
Reported group and individual questions for QT; engineering onsite reported as 3-5 interviews of 60 min.
What it tests
| Topic | Weight |
|---|---|
| Probability | 22% |
| Expected value | 12% |
| Statistics | 12% |
| Coding | 10% |
| Algorithms | 10% |
| Combinatorics | 8% |
| Brainteasers | 8% |
| Mental math | 6% |
| Estimation | 5% |
| Behavioural | 4% |
| System design | 3% |
Shares estimated from the public sources below.
Practise for it
Offices
Miami, New York, Chicago, London, Dublin, Hong Kong, Singapore, Sydney, Zurich
Sources
Thin evidence: official Citadel Securities interview-process pages block automated fetches, so all details are reported. Reports often mix Citadel (hedge fund) and Citadel Securities.
Compiled from public sources, retrieved 2026-11-03. Citadel Securities has not reviewed or endorsed this page.