About Susquehanna International Group
Susquehanna International Group (SIG) is a Bala Cynwyd–based market maker that has trained generations of quant traders. SIG is famous for its games-based culture — the firm screens for poker-like decision-making and applies it across options market making, ETFs, futures, and more recently crypto. Roles include trader, quantitative researcher, quantitative trader, and a deep technology org.
For current openings see our SIG listings.
Interview Process
- Online assessment: timed probability and math test
- Phone interviews: one to two rounds, often a probability-heavy phone screen
- Final round: on-site or virtual super-day, including the famous SIG trading game and several poker hands as part of the day
The SIG Trading Game
SIG's market-making game is the round candidates remember. You and other candidates trade against each other and against the interviewer in multiple rounds. Each round introduces new information — a die roll, a card draw, a hidden number — and you set bid-ask quotes and decide whether to trade. Key skills:
- Pricing expected value with partial information
- Updating your prices after each trade reveals something about other players
- Managing your inventory — running too long or too short is punished
- Reading other players' behavior for soft information
Poker
SIG genuinely uses poker as a learning tool. Several interviews include hands of poker — Texas hold'em — where they're watching how you size bets, manage risk, and respond to position. You don't need to be a winning poker player, but you should know the basics: pot odds, implied odds, and the concept of position.
Probability and Mental Math
Classic interview probability is fair game: dice, coins, conditional probability, expected value, Bayesian updating. Mental math is tested rigorously — practice multiplications, percent calculations, and quick decimal-to-fraction conversions.
Behavioral
SIG values curiosity, competitiveness, and resilience. Expect questions about a time you took a calculated risk, a time you made the wrong decision, and how you've improved at something through deliberate practice. They love games-thinking — chess, poker, video games, board games — so don't bury that on your resume.
How to Prepare
- Practice the trading game format — try our card-counting game and the Fermi estimation game
- Read The Theory of Poker by David Sklansky if you're new to poker
- Get fast at mental math — see our mental math game
- Study expected value frameworks; many SIG questions reduce to "what's the EV?"