5+ years of software development experience in C#, Java, or C++
Deep knowledge of the FIX protocol with hands-on experience in brokerage or trading environments
Experience with order routing in a global trading environment
Strong analytical skills for debugging complex systems
Excellent communication skills for diverse interactions
Familiarity with financial models or algorithmic trading strategies
Experience with low-latency or high-throughput system design
Responsibilities
Design, develop, and maintain systems for electronic order routing globally
Build and enhance FIX connectivity for clients and brokers
Collaborate with global teams to support international trading relationships
Troubleshoot and resolve connectivity issues with traders and vendors
Contribute to architectural decisions for scalable system design
Document systems and workflows clearly
Benefits
Opportunity to work on high-impact systems in a global trading environment
Collaborative work culture with teams across multiple continents
Focus on innovative technology in electronic trading
Exposure to cutting-edge financial solutions
Potential for career growth within a rapidly expanding organization
Full 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.
If you're a recruiting agency and want to partner with us, please reach out to recruiting@sig.com. Any resume or referral submitted in the absence of a signed agreement will not be eligible for an agency fee.
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About Susquehanna International Group
Susquehanna International Group is a global quantitative trading firm that was founded in 1987. The company specializes in trading options, futures, equities, and other securities. It has offices in North America, Europe, and Asia and employs over 2,500 people. The company is known for its innovative trading strategies and advanced technology. It is also involved in venture capital and private equity investments.
