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Susquehanna International Group, Llp (Sig) Interview Questions

A/B Testing

Algorithms

Analytics

Machine Learning

Probability

Product Metrics

Python

Statistics

Susquehanna International Group, Llp (Sig) Interview Guides

Given two independent standard normal random variables $X$ and $Y$, what’s the probability that $2X > Y$?

If $X$ and $Y$ both follow a standard normal distribution ($\mathcal{N}(0,1)$), what distribution does $2X - Y$ follow?

If $X$ and $Y$ both follow a standard normal distribution ($\mathcal{N}(0,1)$), what distribution does $2X - Y$ follow?

2X - Y

If you multiply a random variable by a negative number, say -a, what happens to its variance?

If you multiply a random variable by a negative number, say -a, what happens to its variance?

Multiplying Random Variables

We have two buckets full of marbles. There are 30 red marbles and 10 black marbles in Bucket #1 and 20 red and 20 Black marbles in Bucket #2. Your friend secretly pulls a marble from one of the two buckets and shows you that the marble is red.

<ol>
<li>What is the probability that it was pulled from Bucket #1?</li>

<li>Let’s say your friend puts the marble back in and now picks two marbles. She draws one marble, puts it back in the same bucket, then draws a second. They both happen to be red. What is the probability that they both came from Bucket #1?</li>
</ol>

Marble Bucket

Suppose there exists a new airline named Jetco that flies domestically across North America. Jetco recently had a study commissioned that tested the boarding time of every airline, and it came out that Jetco had the fastest average boarding times of any airline.

What factors could have biased this result, and what would you look into?

What could potentially bias the average boarding time in favor of an airline that only flies domestically?

What could potentially bias the average boarding time in favor of an airline that only flies domestically?

Boarding Times Bias

A new airline came out as the fastest average boarding times compared to other airlines.  What factors could have biased this result and what would you look into?

Susquehanna International Group, Llp (Sig) Salaries by Position

OverviewJoining Susquehanna’s Trading Operations team as a Business Analyst places you right in the heart of our business. Working directly with global teams across Trading, HR, Legal, Operations, and Technology, you’ll serve as the key bridge between stakeholders and our development teams—translating business requests into tools, systems, diagrams, and reports that directly impact how we operate. At Susquehanna, there’s no single way to improve processes. You’ll leverage your creativity, communication, and technical skills to assess and articulate business needs, design optimized workflows, and collaborate with technology to build solutions that make an impact. In this role you will:<ul><li>Work across our Bala HQ, Dublin, and Sydney offices to support the development and implementation of universal calculation tools that are agnostic to location and securities type.</li><li>Support the build-out of an internal books and records system that integrates counter-party data from multiple trading systems and normalizes it for easier use.</li><li>Manage the development of reconciliation tools that streamline data comparison and trade reporting.</li><li>Design and document end-to-end business processes and workflows using tools such as Microsoft Visio, Lucidchart, or similar, to improve cross-functional understanding and solution development.</li><li>Partner with technical teams to transform workflow diagrams into functional system designs and implementations.</li></ul> What we're looking for<ul><li>Bachelor’s degree required; specialization in finance or STEM discipline preferred.</li><li>Minimum of 5 years of experience in a Trading Operations, Business Analyst, or related role.</li><li>Demonstrated experience designing workflows and business processes using diagramming tools such as Microsoft Visio.</li><li>Strong analytical and problem-solving skills, with excellent time management and prioritization abilities.</li><li>Experience with Excel required; knowledge of VBA, SQL, and/or scripting (e.g., Python) is preferred.</li><li>Understanding of SDLC models is a plus.</li><li>Familiarity with relational database concepts preferred.</li><li>Visa sponsorship for work authorization is not available for this position now or in the future.</li></ul> About SusquehannaSusquehanna is a global quantitative trading firm powered by scientific rigor, curiosity, and innovation. Our culture is intellectually driven and highly collaborative, bringing together researchers, engineers, and traders to design and deploy impactful strategies in our systematic trading environment. To meet the unique challenges of global markets, Susquehanna applies machine learning and advanced quantitative research to vast datasets in order to uncover actionable insights and build effective strategies. By uniting deep market expertise with cutting-edge technology, we excel in solving complex problems and pushing boundaries together.

Question	Topic	Difficulty	Ask Chance
2X - Y	Probability	Medium	Very High
Marble Bucket	Probability	Easy	Very High
Boarding Times Bias	Statistics	Medium	High

Susquehanna International Group, Llp (Sig) Interview Questions

Susquehanna International Group, Llp (Sig) Interview Guides

Susquehanna International Group, Llp (Sig) Interview Questions

Susquehanna International Group, Llp (Sig) Salaries by Position

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