Senior C# WPF Engineer for Risk System Replatforming

JUXT; Greater London; On-site; GBP 90,000 - 130,000; Full time

Job summary

JUXT is seeking a Senior C# / WPF Engineer to join a global Tier 1 investment bank on a major Risk System Replatforming Programme. You will own key components, modernise legacy desktop applications, and ensure performance and reliability throughout the transition.

This hands-on role focuses on C#, WPF, and the .NET ecosystem with an emphasis on testing, CI/CD, and code quality. Experience in risk, trading, or financial markets is highly advantageous, especially in front-office or risk workflows.

Qualifications

• Strong C#/.NET and WPF fundamentals.
• Experience with large enterprise desktop applications.
• Experience with automated testing strategies (NUnit/xUnit).
• Familiarity with CI/CD pipelines and modern software delivery.

Responsibilities

• Design, develop and maintain high-performance C#/.NET and WPF applications.
• Modernise and refactor legacy desktop apps within a risk platform rearchitecture.
• Take ownership of individual components and replatforming workstreams.
• Analyse architecture and improve maintainability, scalability and performance.
• Develop robust automated unit, integration and UI tests to prevent regressions.
• Contribute to CI/CD pipelines, automated deployments and quality controls.
• Investigate and resolve production issues and blockers independently.
• Communicate progress, risks and dependencies to stakeholders.

Skills

C#

WPF

.NET ecosystem

Automated Testing

CI/CD

Code Quality

Ownership

Performance

Job description

JUXT is seeking a Senior C# / WPF Engineer to join a global Tier 1 investment bank on a major Risk System Replatforming Programme. You will own key components, modernise legacy desktop applications, and ensure performance and reliability throughout the transition.

This hands-on role focuses on C#, WPF, and the .NET ecosystem with an emphasis on testing, CI/CD, and code quality. Experience in risk, trading, or financial markets is highly advantageous, especially in front-office or risk workflows.