Trading Systems C# Developer

Susquehanna International Group, LLP; Sydney; On-site; AUD 150,000 - 210,000; Full time

Benefits offered by this job

Private healthcare

Lunch allowance

Education Assistance

Matched donations

Job summary

Susquehanna International Group, LLP seeks a Trading Systems Developer to join the Options Technology team. You will analyze, design, and develop business-critical trading systems, guiding projects from requirements to production release.

You’ll collaborate with technologists, traders, and quantitative analysts to deliver optimal outcomes. The role emphasizes C# development, back-end architecture, and a willingness to work with options and risk concepts.

Qualifications

• Bachelor's degree in a technical or related discipline.
• Track record or strong interest in options, trading, risk, or quant systems development.
• Exceptional C# development skills with OOP, multi-threading, and back-end focus.
• Experience or knowledge of options, risk, pricing, and Greeks is highly regarded.

Responsibilities

• Analyze, design, and develop business-critical trading systems through the full SDLC.
• Collaborate with technologists, traders, and quantitative analysts to deliver optimal outcomes.
• Work on back-end services and performance improvements for trading systems.

Skills

C# development

Design patterns

Multithreading

Back-end development

Education

Bachelor's degree in a technical or related discipline

Tools

Azure Service Fabric

Envoy Proxy

gRPC

Protobuf

React JS

Docker

Kubernetes

Octopus Deploy

ELK Stack

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

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

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.