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Full time
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SI

Trading Systems C# Developer

Susquehanna International Group, LLPAustralia🇦🇺AustraliaPosted 24 Sept 2026

Why This Role Stands Out

This hybrid role offers you the exciting opportunity to design and develop critical trading systems, driving significant impact within a leading financial firm. You'll thrive here if you possess strong C# skills and a passion for quantitative finance, collaborating with a talented team to deliver innovative solutions. Take ownership of your career growth in this newly created position with excellent benefits.

Quick Overview

Seniority
Mid Senior
Employment type
Full Time
Work mode
Hybrid
Location
Australia
DockerMicroservicesELKEnvoyAzureC#KubernetesReactgRPC

Job Description

Overview

Susquehanna is looking for a Trading Systems Developer to join our Options Technology team. In this role, you will analyze, design, and develop business-critical trading systems, taking projects through the full software development lifecycle - from requirements gathering to production release. Day to day, you'll collaborate with technologists, traders, and quantitative analysts to deliver optimal outcomes.

What we're looking for
  • A bachelor's degree (or higher) in a technical or related discipline.
  • A track record, working knowledge, or strong interest in options, trading, risk, or quantitative systems development.
  • Exceptional C# development skills, with deep knowledge of design, profiling, object-oriented programming, multi-threading, and performance - particularly in back-end development.
  • Previous experience or working knowledge of options, risk, pricing, and Greeks will be highly regarded

Nice to have

  • Experience with microservices and cloud technologies (e.g., Azure Service Fabric, Envoy Proxy, gRPC, Protobuf, React JS, Docker, Kubernetes, Octopus Deploy, and the ELK Stack).

What's in it for you

  • Our flat hierarchy lets you drive meaningful impact by leveraging your expertise and taking ownership.
  • Greenfield opportunity: a newly created role as we scale across APAC.
  • Private healthcare and wellness initiatives.
  • Daily office lunch allowance.
  • Employee Assistance and Education Assistance Programs.
  • Matched donations and corporate discounts.

This role can be based in either Hong Kong or Sydney.

About Susquehanna

What we do

Susquehanna's deep integration of trading, technology and quant research makes us experts in trading essentially all listed financial products and asset classes, with a focus on derivatives. We handle millions of trading transactions around the world every day as both a market maker and market taker. Our efforts provide liquidity and ensure competitive prices for buyers and sellers. While our presence in the market is broad, our trading desks are highly specialized to allow for a deep understanding of the unique drivers of each asset class.

Equal Opportunity statement We're committed to building a diverse and inclusive workplace. We encourage candidates from all backgrounds to apply and are happy to provide reasonable accommodations during the hiring process.

If you're a recruiting agency and want to partner with us, please reach out to . Any resume or referral submitted in the absence of a signed agreement will not be eligible for an agency fee.

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