C++ Developer | Trading Infrastructure | Experienced Hire

Susquehanna International Group, LLP; Bala Cynwyd (PA); On-site; USD 120,000 - 170,000; Full time

Job summary

Susquehanna is seeking an experienced Software Developer to join a front office team responsible for designing and building low-latency trading systems that power our trading strategies. Our short development cycles mean your work reaches production quickly, and your impact is immediate and visible.

You will design high-performance, low-latency systems and own the full technical stack from design through implementation, focusing on stability, scalability, and minimizing operational risk.

Qualifications

• Bachelor's degree in CS/Engineering/Math or related field.
• 3+ years of progressive software or trading infrastructure experience.
• Strong system design foundations balancing performance, reliability, and simplicity.
• Experience with high-performance or low-latency system development.
• Solid OO programming skills and sound engineering practices.
• Ability to work with traders and quants to shape technical solutions.
• Curiosity and initiative to explore new technologies.

Responsibilities

• Design and build high-performance, low-latency systems where architecture choices directly affect trading outcomes.
• Own the full technical stack - from system design through implementation - with a focus on stability, scalability, and minimizing operational risk.
• Evaluate and prototype new technologies, tools, and approaches to keep our systems and infrastructure ahead of the curve.
• Apply strong software engineering fundamentals, including object-oriented design, to build systems that are both fast and maintainable.

Skills

Object-oriented programming

Low-latency development

System design

Stakeholder communication

Curiosity and initiative

Education

Bachelor's degree in CS/Engineering/Math or related field

Job description

Overview

Susquehanna is seeking an experienced Software Developer to join a front office team responsible for designing and building low-latency trading systems that power our trading strategies. Our short development cycles mean your work reaches production quickly, and your impact is immediate and visible.

In this role, you will:

• Design and build high-performance, low-latency systems where architecture choices directly affect trading outcomes
• Own the full technical stack - from system design through implementation - with a focus on stability, scalability, and minimizing operational risk
• Evaluate and prototype new technologies, tools, and approaches to keep our systems and infrastructure ahead of the curve
• Apply strong software engineering fundamentals, including object-oriented design, to build systems that are both fast and maintainable

What we’re looking for

• Bachelor's degree in Computer Science, Engineering, Mathematics or related discipline or its foreign equivalent
• 3+ years of progressive experience developing software applications or trading infrastructure
• Strong foundation in system design, with the judgment to balance performance, reliability, and simplicity
• Experience with (or strong aptitude for) high-performance or low-latency system development
• Solid object-oriented programming skills and sound engineering practices
• Comfort working directly with non-engineering stakeholders (traders, quants) to shape technical solutions around real trading needs
• Curiosity and initiative, with a track record of investigating new technologies and proposing improvements

About Susquehanna

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.

What we do

We are experts in trading essentially all listed financial products and asset classes, with a focus on derivatives trading. Through market making and market taking, we handle millions of trading transactions around the world every day, providing liquidity and ensuring competitive prices for buyers and sellers. While our presence in the market is broad, our trading desks are highly specialized, allowing for a deep understanding of unique drivers of each asset class.