Overview As a C# Lead Developer in the Core Trading Technology team, you will lead the analysis, design and development of applications in a Front Office trading environment. The software spans server-side systems and user interfaces. You will manage and mentor a team of developers while remaining hands-on in the technical direction of the platform. You will work closely with traders, quantitative researchers and technology teams to turn requirements into reliable, high-performing software covering almost all aspects of the trading environment.
The Sydney Core Trading Technology team owns a rich mix of proprietary software focused on highly available applications, including trading analysis tools, market and static data feeds, trade monitoring and real-time messaging, all used to support trading decisions. Responsibilities Leadership and people
• 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, pairing, and career development.
• Contribute to hiring, onboarding, performance feedback and succession planning.
• Foster a high-performing, collaborative and accountable engineering culture. Technical delivery
• Own the analysis, design and development of business-critical applications, from requirements gathering through to production release and support.
• Set technical direction and architecture standards, and make sound design trade-offs across performance, resilience and maintainability.
• Establish and uphold engineering best practice, including code quality, testing, profiling, CI/CD and operational readiness.
• Remain hands-on where it matters: prototyping, tackling complex multi-threading and performance problems, and reviewing critical code. Stakeholders and improvement
• Partner with traders,



quants and senior technology stakeholders to understand needs, set expectations and communicate delivery status and risks.
• Drive continuous improvement of the team’s capability and applications through technology, automation and process.
• Stay curious about new technologies and assess where they can add value to the trading platform. What we’re looking for Essential qualifications and experience
• 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 client-side development.
• Proven experience leading or managing a development team, including mentoring junior engineers and developing talent.
• Deep knowledge of software design, object-oriented 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 the full software development life cycle, ideally in an Agile environment.
• Strong interpersonal and communication skills, with the ability to engage traders, quantitative analysts, developers and senior management.
• Ability to meet deadlines and make sound decisions under pressure in a fast-paced setting.
• Excellent attention to detail and accuracy. Advantageous
• WPF experience.
• Experience running and deploying .
NET Core applications on Linux.
• Experience with real-time applications, especially Tibco RV.
• Experience in a front-office trading or financial markets environment. What You’ll Bring to the Team
• A balance of hands-on technical credibility and people leadership.
• The ability to build trust with both engineers and business stakeholders.
• A commitment to raising the bar for the team’s skills, tooling and delivery practices. #LI-CC3

📌 Lead C# Developer (Sydney)
🏢 Susquehanna International Group
📍 Sydney