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Lead C# Developer - Core Trading Technology

SIGPosted Nov 9, 2026
Sydney (Asia-Pacific)
Prop TradingDevMid-Senior

About this role

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 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.

 

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