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 robust 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 environment.
- 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.

📌 Lead C# Developer - Core Trading Technology (Sydney)
🏢 Susquehanna International Group
📍 Sydney