Software Developer - Global Routing | Experienced Hire

SIG Susquehanna; Pennsylvania; On-site; USD 90,000 - 120,000; Full time

Job summary

SIG Susquehanna, located in Pennsylvania, is looking for a Software Developer to join the Global Routing team. In this role, you will design and develop systems that support electronic order routing across global markets and venues. Candidates should have at least 5 years of software development experience, particularly with C#, Java, or C++, and a deep knowledge of the FIX protocol. Collaborating with teams worldwide while troubleshooting connectivity issues will be part of your responsibilities. Join us to work on impactful systems in a collaborative environment.

Qualifications

• 5+ years of software development experience.
• Deep knowledge of the FIX protocol.
• Experience with order routing in a multi-system, global trading environment.

Responsibilities

• Design, develop, and maintain systems for electronic order routing.
• Build and enhance FIX connectivity.
• Collaborate with business counterparts to support international expansion.

Skills

C#

Java

C++

FIX protocol

Analytical skills

Low-latency design

Communication skills

Job description

Overview

Susquehanna International Group is seeking a Software Developer to join our newly formed Global Routing team. This team owns the electronic trading connectivity infrastructure that powers Susquehanna’s client-facing brokerage business worldwide. You'll work on high-impact systems that handle order flow across major global markets, collaborating closely with trading, operations, and technology teams in our U.S., European, and Asian offices.

Key Responsibilities

• Design, develop, and maintain systems that support electronic order routing across global markets and venues.
• Build and enhance FIX connectivity for clients, brokers, exchanges, and internal systems.
• Partner with business counterparts in Susquehanna's Europe and Asia offices to support international expansion and onboard new trading relationships.
• Collaborate with traders, operations, developers, and external vendors to troubleshoot and resolve connectivity issues in a fast-paced environment.
• Contribute to architectural decisions and advocate for scalable, reliable system design.
• Document systems, workflows, and integration specifications clearly and thoroughly.

What we're looking for

• 5+ years of software development experience in C#, Java, or C++.
• Deep knowledge of the FIX protocol, with hands‑on experience implementing or supporting FIX connectivity at a brokerage, trading firm, exchange, fintech, or OMS/EMS vendor.
• Experience with order routing in a multi‑system, global trading environment.
• Strong analytical skills with the ability to debug complex, distributed systems.
• Excellent communication skills — you're equally comfortable talking to a quant, a trader, or a client.
• Familiarity with financial models or algorithmic trading strategies.
• Experience with low‑latency or high‑throughput system design.
• Prior work with connectivity to global exchanges or dark pools.

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.