Lead C# Developer - Core Trading Platform

Susquehanna International Group; Sydney; On-site; AUD 180,000 - 250,000; Full time

Job summary

Susquehanna International Group in Sydney, NSW, seeks a Lead C# Developer for Core Trading Technology. You will lead analysis, design and development in a fast-paced front office trading environment, while mentoring a team of engineers and remaining hands-on in technical direction.

The role covers server-side systems and UI development, working with traders, quants and technology teams to deliver reliable, high-performing software.

Qualifications

• Bachelor's degree or higher in a technical or related discipline.
• 10+ years of C# experience across server-side systems with strong multi-threading and UI development.
• Proven experience leading or managing a development team, including mentoring engineers.
• Deep knowledge of software design, OO principles, profiling and performance tuning, multi-threading, and UI development on both client and server sides.
• Track record of delivering complex, business-critical systems through full SDLC, ideally in Agile environments.
• Strong interpersonal and communication skills with traders, quants, developers and senior management.
• Ability to meet deadlines and make decisions under pressure in a fast-paced environment.
• Excellent attention to detail and accuracy.

Responsibilities

• Lead and manage a team of developers, setting priorities, allocating work and removing blockers.
• Mentor and coach junior and mid-level developers through code reviews and career development.
• Contribute to hiring, onboarding and performance feedback.
• Own the analysis, design and development of business-critical applications from requirements to production release.
• Set technical direction and architecture standards for performance and resilience.
• Uphold engineering best practices including code quality, testing, CI/CD and operability.
• Remain hands-on for prototyping, complex multi-threading and critical code reviews.
• Partner with traders, quants and technology stakeholders to understand needs and communicate status.

Skills

C# programming

Multi-threading

Leadership

Mentoring

UI development

Agile

Education

Bachelor's degree in a technical field

Tools

WPF

.NET Core

Linux deployment

Tibco RV

Job description

Susquehanna International Group in Sydney, NSW, seeks a Lead C# Developer for Core Trading Technology. You will lead analysis, design and development in a fast-paced front office trading environment, while mentoring a team of engineers and remaining hands-on in technical direction.

The role covers server-side systems and UI development, working with traders, quants and technology teams to deliver reliable, high-performing software.