Trading Systems C# Developer

Susquehanna International Group, LLP; Hong Kong; On-site; HKD 700,000 - 1,100,000; Full time

Benefits offered by this job

Private healthcare

Lunch allowance

Education assistance

Wellness programs

Job summary

Susquehanna International Group, LLP is seeking a Trading Systems Developer to join our Options Technology team. You will analyze, design, and develop business-critical trading systems through the full software development lifecycle, collaborating with technologists, traders, and quantitative analysts to deliver optimal outcomes.

The role offers a greenfield opportunity as we scale across APAC, with benefits including private healthcare and daily lunch allowance.

Qualifications

• 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.

Responsibilities

• Analyze, design, and develop business-critical trading systems through the full software development lifecycle from requirements gathering to production release.
• Collaborate with technologists, traders, and quantitative analysts to deliver optimal outcomes.
• Support and scale trading systems across APAC, with flexibility to be based in Hong Kong or Sydney.

Skills

C# development

Back-end development

Multi-threading

Performance optimization

Design patterns

Education

Bachelor's degree in a technical field

Tools

Azure Service Fabric

Docker

Kubernetes

gRPC

Protobuf

React JS

Envoy Proxy

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.

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.