Senior Software Engineer | Research Tech | Experienced Hire

Susquehanna 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.

At Susquehanna, we believe great research demands great tools.

We are looking for a Senior Software Engineer to join our Research Tech team, which builds the applications, services, and platforms that support trading strategies and make research workflows more scalable across the firm.

You’ll work at the intersection of engineering, quantitative research, and production infrastructure — with meaningful ownership of the systems that researchers and traders rely on every day.

This is not your typical engineering job.

You’ll partner directly with quantitative researchers and trading leads on a daily basis — designing, building, and supporting the applications they use to explore ideas, run analyses, and put strategies into production.

If you enjoy substantive engagement with the math and stats side of the work — and not just implementing what quants ask for — you’ll find plenty of that here.

How you’ll make an impact:

• Build research applications, services, and platforms that support trading strategies — spanning beta analysis across baskets of stocks, news aggregation, trading-opinion workflows, and the production infrastructure needed to run these capabilities reliably
• Partner directly with quantitative researchers and traders on a daily basis to understand their needs, translate them into working systems, and deliver features end-to-end from design through production
• Improve production behavior of the platform — observability, debugging tooling, and performance tuning under load
• Work across the full stack — C# and .NET backend services, React and JavaScript frontends, and Python for data-intensive services — collaborating with adjacent engineering teams across the firm and internationally

What you can expect from us:

Real Impact: By integrating sophisticated coding techniques with innovative engineering ideas, we design and optimize systems that can process massive amounts of data while still ensuring high performance and stability.