Senior C# Engineer - Front Office

Lanson Partners; Sydney; Hybrid; AUD 111,000 - 185,000; Full time

Job summary

Lanson Partners is seeking a Senior C#/.NET Engineer to join a front-office technology team in Sydney, supporting FX Options and Fixed Income trading applications. This hands-on role collaborates closely with traders and business users to deliver features and fixes in a fast-paced environment.

You’ll work on an existing desktop trading app, contribute across the SDLC, and leverage AI-assisted development tools where applicable, while ensuring robust production support and stakeholder

Qualifications

• Strong commercial C#/.NET experience.
• Solid WPF experience.
• Experience supporting or enhancing existing desktop applications.
• Front-office, trading, markets, risk or investment banking experience.
• Strong stakeholder management skills.
• Comfortable working directly with demanding business users/traders.
• Strong debugging and production support capability.
• Git/GitHub and modern development practices.
• Experience with AI-assisted development tools desirable.

Responsibilities

• Supporting and enhancing an existing C#/.NET trading application.
• Working closely with FX Options traders and business stakeholders.
• Delivering new features and production fixes.
• Supporting the application through an ongoing transition/decommissioning programme.
• Troubleshooting issues in a fast-paced front-office environment.
• Contributing across the full SDLC.
• Using AI-assisted development tools, including Claude, as part of day-to-day engineering.

Skills

C#/.NET

WPF

Desktop apps

Stakeholder mgmt

Debugging

Git/GitHub

AI tools

Tools

GitHub

Job description

We’re working with a leading financial services organisation looking for a Senior C#/.NET Engineer to join a front-office technology team supporting FX Options and Fixed Income.

This is a hands-on role working closely with traders, supporting and enhancing an existing business-critical trading application. The environment is fast-paced and stakeholder-heavy, so they need someone technically strong, pragmatic and comfortable operating directly with front-office users.

What you'll be doing

• Supporting and enhancing an existing C#/.NET trading application
• Working closely with FX Options traders and business stakeholders
• Delivering new features and production fixes
• Supporting the application through an ongoing transition/decommissioning programme
• Troubleshooting issues in a fast-paced front-office environment
• Contributing across the full SDLC
• Using AI-assisted development tools, including Claude, as part of day-to-day engineering

What we're looking for

• Strong commercial C#/.NET experience
• Solid WPF experience
• Experience supporting or enhancing existing desktop applications
• Front-office, trading, markets, risk or investment banking experience
• Strong stakeholder management skills
• Comfortable working directly with demanding business users/traders
• Strong debugging and production support capability
• Git/GitHub and modern development practices
• Experience with AI-assisted development tools desirable

The opportunity

• 12-month contract
• Up to $1,000/day + super
• Sydney-based - Hybrid
• Option to renew for another 12 months
• Direct exposure to front-office trading teams
• High-profile financial markets environment