Senior Software Engineer, Research Tech & Trading Platforms

Susquehanna International Group, LLP; Bala Cynwyd (PA); On-site; USD 130,000 - 170,000; Full time

Job summary

Susquehanna International Group, LLP is seeking a Senior Software Engineer to join the Research Tech team. You will build applications and services that support trading strategies, collaborating with researchers and traders on end-to-end features from design to production.

You’ll work across the stack—C#/.NET, React, and Python—delivering scalable workflows and data-intensive services in a highly collaborative environment.

Qualifications

• 5+ years of software engineering experience with strong hands-on experience in C#, Python, and React.
• Full-stack comfort — backend services through frontend interfaces.
• Strong communication skills and the ability to iterate quickly with quantitative researchers, traders, and other developers.
• A minimum of a Bachelor’s degree in Computer Science, Computer Engineering, Mathematics, Physics, or a related technical field.

Responsibilities

• Build research applications, services, and platforms supporting trading strategies and production infrastructure.
• Collaborate daily with quantitative researchers and traders to translate needs into working systems.
• Improve production behavior, observability, debugging tooling, and performance under load.
• Work across the full stack: C#/.NET backend, React/JavaScript frontend, and Python data services.

Skills

C#

Python

React

Education

Bachelor's degree in Computer Science/Engineering/Math/Physics

Job description

Susquehanna International Group, LLP is seeking a Senior Software Engineer to join the Research Tech team. You will build applications and services that support trading strategies, collaborating with researchers and traders on end-to-end features from design to production.

You’ll work across the stack—C#/.NET, React, and Python—delivering scalable workflows and data-intensive services in a highly collaborative environment.