Susquehanna International Group (SIG) is a trading firm that hires into three areas: trading, technology, and quantitative research and machine learning. SIG says trading is about making decisions under uncertainty, and that it uses puzzles to emulate the trading environment, and that its traders learn to apply probability, odds and expectancy.
The details below come from SIG's careers pages and its own blog, linked as we go. SIG publishes very little about its interview stages and nothing about its online assessment, so where it doesn't say something, we say so. The interview questions are built from the topics SIG publishes; SIG hasn't released a question list.
The Susquehanna hiring process at a glance
SIG doesn't publish its interview stages. This is what its pages and candidate reports show:
| Step | What happens | Source |
|---|---|---|
| 1. Apply | Apply at careers.sig.com for an internship or co-op, PhD or postdoc, graduate or experienced role. | SIG |
| 2. Online assessment | Candidates report a timed online test on probability and maths for some roles. | Reported, not published by SIG |
| 3. Interviews | Interviews that use puzzles to emulate the trading environment, plus questions on your background. | SIG on puzzles; rounds not published |
| 4. Offer | SIG doesn't describe its offer stage. | Not published |
| 5. Training | Trading hires join the Quantitative Trading Program; quant hires get a three-month finance class. | SIG |
What is the Susquehanna interview process?
SIG doesn't publish a step-by-step interview process, the number of rounds or a timeline. It does say what the interviews are like for trading candidates: "We use puzzles to emulate the trading environment and give our candidates the opportunity to see what it's like to work here."
Candidate reports on review sites describe an online assessment first, then a recruiter conversation and one or more technical interviews built around probability problems. The order and number of rounds vary between reports and by role, so treat them as reported, and ask your recruiter what to expect.
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How do you apply to Susquehanna?
You apply on careers.sig.com. SIG's careers page groups roles by career stage:
- Internships and co-ops for students.
- PhDs and postdocs.
- Recent graduates.
- Experienced professionals.
Students who aren't yet eligible for internships can apply to SIG's Discovery Programs. SIG says these give students "an early introduction to our interview process" as well as to the firm. If you're not ready to apply, you can join SIG's talent community to hear about new roles.
SIG's offices include Bala (near Philadelphia), Dublin, Sydney and New York, and roles are listed by location.
Does Susquehanna have an online assessment?
SIG doesn't describe an online assessment on any of its careers pages. Candidates on review sites report a timed online test early in the process for some roles, mostly probability, expected value, combinatorics and logic. SIG hasn't confirmed the format, so treat the question counts, time limits and platforms you read on prep sites as unconfirmed, and follow the instructions in your invitation.
What you can prepare for with confidence is the subject matter SIG names itself. Its trading careers page says traders learn to apply probability, odds and expectancy, and that trading "is all about making decisions under uncertainty". Practise:
- Probability with dice, cards and coins, including conditional probability.
- Expected value, and deciding whether a bet is worth taking.
- Quick, accurate arithmetic without a calculator.
- Reading a question carefully under time pressure before you start calculating.
For software and technology roles, SIG doesn't publish whether there's a coding test. Ask your recruiter.
What happens in Susquehanna interviews?
For trading roles, expect puzzles and probability questions, worked through aloud with the interviewer. SIG says the puzzles let candidates "see what it's like to work here", so show your reasoning as you go.
SIG's game theory and decision science page shows the thinking it values. It explains four biases with trading examples:
| Bias | What SIG says it means for trading |
|---|---|
| Confirmation bias | Actively look for information that disconfirms your price. |
| Anchoring | Traders can anchor on an earlier estimate and adjust too little when new information arrives. |
| Availability bias | Probability estimates get skewed by what's easy to recall, such as a recent run of coin flips. |
| Framing | The same outcomes, framed differently, can push people to an inferior choice. |
Showing you're aware of these in your own reasoning, for example by updating an estimate when the interviewer gives you new information, fits what SIG says it trains for.
For quantitative research roles, SIG's quant page quotes one of its researchers in Dublin: "The ability to develop a new idea or approach to a problem is far more valued than having a preexisting knowledge of finance." Expect to discuss your research and how you approach open problems.
For technology roles, SIG says its technologists build trading systems that process massive amounts of data. Be ready to discuss systems you've built, especially where speed or scale mattered.
What happens after you join Susquehanna?
SIG describes extensive training. Traders and research analysts in its Quantitative Trading Program receive game theory training, and SIG says it uses poker "to teach new traders about decision making under uncertainty". New quants get a three-month finance class, a mentorship programme and a starter project. Technology students and graduates get classroom education, and SIG says each group has its own learning plan.
Common Susquehanna interview questions and how to answer them
These are questions to prepare for, based on what SIG says it looks for. SIG hasn't published a question list.
1. Why Susquehanna?
Be specific. SIG puts game theory and decision science at the centre of its trading education and culture, and runs a games and strategy blog, Raise Your Game. Explain why making decisions under uncertainty interests you, and mention a game or problem where you've done it.
2. What's the expected value of this game, and would you play it?
SIG's traders learn to apply probability, odds and expectancy. Define the outcomes, attach probabilities, calculate the expected value aloud and then make a decision. Say what would change your answer, such as the stake or how many times you can play.
3. Here's a probability puzzle. Talk me through it.
SIG uses puzzles to emulate trading. State your approach before you calculate, check your answer with a quick sanity test, and say so if you spot a mistake. A clear method with one correction beats a silent guess.
4. Estimate a number you can't look up, and give me a range.
Break the problem into parts you can estimate, combine them and give a range you'd be confident in. Be ready to defend it, and to change it if the interviewer gives you new facts.
5. I've just given you new information. Does your answer change?
This tests anchoring, which SIG says can make traders adjust too little. Update clearly: say what the new information changes, by how much and why. SIG's own blog has a poker quiz on incorporating new information.
6. Tell me about a game you play and how you got better at it.
SIG names poker, chess, Wizard, Magic: The Gathering, esports and strategic board games as games that build trading skills. Any game works if you can explain a decision you used to get wrong and how you fixed it.
7. Tell me about a decision you made with incomplete information.
Describe what you knew, what you didn't, how you weighed the options and what happened. Say what you'd do differently, since a good decision can still have a bad outcome.
8. Tell me about a time you were wrong.
SIG's decision science page warns against confirmation bias and stresses looking for evidence that disconfirms your view. Give an example where you noticed you were wrong, changed your mind and learned something.
9. Describe a research project and the approach you took.
For quant roles. Explain the question, why you chose your method, what didn't work and what you'd try next. SIG's researchers say a new approach matters more than finance knowledge, so show your thinking.
10. Tell me about a system you built and how you made it faster.
For technology roles. SIG says it builds "the fastest and most powerful trading systems in the industry", so pick a project where performance or scale mattered and explain the trade-offs you made.
11. Why trading, rather than research or technology?
SIG hires into all three and says they work closely together. Show you understand the difference, and why the role you applied for suits how you like to work.
12. Do you have any questions for us?
Ask about the training in your first year, how the desk or team makes decisions together, and what separates people who do well. Ask about the remaining steps too, since SIG doesn't publish a timeline.
How to prepare for a Susquehanna interview
- Practise probability and expected value daily, with dice, cards and coin problems, and say your reasoning out loud.
- Practise mental arithmetic until simple calculations are quick and accurate.
- Read SIG's game theory and decision science page and be ready to spot those biases in your own answers.
- Play strategy games and think about the decisions you make. Poker is the obvious one, given SIG's use of it in training.
- Know your own projects in depth, especially for quant and technology roles.
- Do a mock interview with someone who will give you puzzles you haven't seen.
- Only use official channels. SIG says job offers asking for payment, banking details or personal information are fraudulent. Apply through careers.sig.com.
Practising realistic work tasks
SIG's interviews test how you reason under pressure, which improves with practice on realistic problems. Cohesyve, which publishes this guide, runs practice job simulations for your role, with a scored report on where you lost marks. It isn't affiliated with Susquehanna International Group and doesn't use its assessments or questions.
FAQs
Do I need to know finance for a Susquehanna interview?
SIG doesn't list finance knowledge as a requirement on its careers pages. One of its quant researchers says developing a new idea or approach is far more valued than existing finance knowledge, and new quants take a three-month finance class.
How long is the Susquehanna online assessment?
SIG doesn't publish it. Candidates report a timed test, but the length and question count vary between reports. Follow the instructions in your invitation.
Does Susquehanna use poker in interviews?
SIG says it uses poker to teach new traders about decision-making under uncertainty. It doesn't say poker is part of its interviews. Its trading interviews use puzzles.
How long is a Susquehanna internship?
SIG doesn't state a length on its internship page. Intern testimonials there describe ten-week summer internships.
How long does the Susquehanna hiring process take?
SIG doesn't publish a timeline. Ask your recruiter about the remaining steps.
How do I know a Susquehanna recruiter is genuine?
SIG says it doesn't solicit business through WhatsApp, Telegram, WeChat, Signal or similar platforms, and that you should never transfer money in connection with a claimed SIG affiliation. Apply through careers.sig.com and report suspected fraud to report-fraud@sig.com.
Sources
Susquehanna's own pages, checked 27 October 2026:
- sig.com: Careers
- sig.com: Trading careers
- sig.com: Quantitative Research + Machine Learning careers
- sig.com: Technology careers
- sig.com: Interns + Co-ops
- sig.com: Game Theory + Decision Science
- sig.com: Life at Susquehanna
- sig.com: Fraud and impersonation warning
- raiseyourgame.com: Raise Your Game, SIG's games and strategy blog