C# Trading Systems Developer - GDS

Susquehanna International Group, LLP; Sydney; On-site; AUD 130,000 - 180,000; Full time

Benefits offered by this job

Private healthcare

Gym allowances

Wellness initiatives

Marriage leave

2 bonus days annually

Breakfast and lunch provided

Social events

Poker tournament

Matched donations

Corporate discounts

Kitchens and meals

Job summary

Susquehanna International Group, LLP in Sydney, Australia seeks a senior C# developer to build high‑performance distributed, server‑based and front‑end trading systems. You will work with traders and quant researchers on live markets across Asia, US and Europe to implement trading models and signals.

You’ll collaborate across tech teams to deliver integrated solutions, benefit from a flat hierarchy and a competitive bonus, private healthcare, gym allowances, and generous leave.

Qualifications

• Tertiary education in Computer Science, a related field or experience in building complex computer systems.
• 5+ years of professional C# or similar development experience.
• An understanding of basic financial instruments and financial concepts, or any formal financial education would be beneficial.
• Experience in Financial Trading Systems, or other areas involving live financial data and order systems.
• Any experience with web services, distributed systems, or cloud technologies would be beneficial.
• Any experience or interest in working with Linux, Python or C++ beneficial.
• Any experience or interest in working with WPF or other user interface technologies beneficial.

Responsibilities

• Work closely with traders and other engineers on developing high performance C# distributed, server-based and front-end trading systems.
• Work closely with quantitative researchers on implementing trading models and signals.
• Work closely across other technology teams to developed integrated technical solutions for trading.

Skills

C#

Distributed systems

WPF

Cloud technologies

Linux

Python

Education

Bachelor's degree in Computer Science or related field

Tools

Web services

SQL databases

Version control

Job description

Overview

The GDS (Global Delta Specials) development team is responsible for developing and maintaining trading technologies that help improve the GDS desk trading efficiency and profitability. The technologies are an essential part of the desk trading that cover exchanges in Asia from Japan to India. The technologies focus on efficiently processing and monitoring market activities, quickly making trading decisions and smartly execute trading decisions. Developers in our team have the opportunity to work with all Asian as well as US and European markets on various trading models and strategies and gain exclusive knowledge on quant analysis processes and trading ideas.

What you’ll do

• Work closely with traders and other engineers on developing high performance C# distributed, server-based and front-end trading systems.

• Work closely with quantitative researchers on implementing trading models and signals.

• Work closely across other technology teams to developed integrated technical solutions for trading.

What we’re looking for

• Tertiary education in Computer Science, a related field or experience in building complex computer systems.
• 5+ years of professional C# or similar development experience.
• An understanding of basic financial instruments and financial concepts, or any formal financial education would be beneficial.
• Experience in Financial Trading Systems, or other areas involving live financial data and order systems.
• Any experience with web services, distributed systems, or cloud technologies would be beneficial.
• Any experience or interest in working with Linux, Python or C++ beneficial.
• Any experience or interest in working with WPF or other user interface technologies beneficial.

What’sin it for you

• Our flat hierarchy enables you to drive meaningful impact, byleveragingyourexpertiseand taking ownership.

• Highly competitiveremunerationand attractive bonus.

• Private healthcare and gym allowances, plus wellness initiatives.

• Additionalleave entitlements including marriage leave and 2 bonus days annually.

• Fully stocked kitchen - daily breakfast and lunch.

• Regular social, sporting and community events including annual poker tournament.

• Matched donations and corporate discounts.

• Explore our benefits and culture:link

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.

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