Quant jobs / Susquehanna International Group (SIG)

C# Trading Systems Developer – GDS

A development role on the desk technology team supporting the GDS trading desk across Asian exchanges. You build C# systems and implement researchers' models and signals alongside traders.

What you’d work on

Our reading of the posting: what a new hire in this role would most likely spend their first months on.

Develop C# server-side and front-end systems used on the trading desk
Implement quant researchers' trading models and signals in production
Build systems that process market activity and support fast trading decisions
Join up solutions with other technology teams

What they ask for

Required

5+ years of professional C# or similar development
Tertiary education in computer science or equivalent experience building complex systems
Trading systems or live financial data and order flow experience
Basic financial instruments knowledge

Preferred

Web services, distributed systems or cloud
Linux, Python or C++
WPF or other UI technologies

Education: Tertiary education in computer science or a related field, or equivalent experience
Experience: 5+ years of professional C# or similar development
Languages and tools: C#
Python
C++
Markets: multi-asset

How to prepare

Build a small C# service that consumes a market data feed and shows live state
Learn basic order types, exchange sessions and instrument data
Study how a trading model's signal becomes an order in a production system
Practise multi-threaded and distributed design in C#

What to study

The HFT Quant Developer roadmap sets out the stages for this kind of role, with free resources for each.

Open the roadmap

Apply

Read the full posting on Susquehanna International Group (SIG)’s site before applying: requirements, location and pay can change after we check them.

View the posting on Susquehanna International Group (SIG)’s site ↗

SelfMadeQuant wrote this summary from the employer’s public posting, last checked 6 November 2026. SelfMadeQuant isn’t affiliated with Susquehanna International Group (SIG) and doesn’t handle applications.