C# / WPF Windows Application Software Engineer

Contract C# / WPF Windows Application Software Engineer Location: Derbyshire - Fully Onsite Contract: Initial 6-12 Months Day Rate: Negotiable DOE IR35: Outside IR35 Security Clearance: Current SC or DV Required We're…

Outside IR35 IT
Pay rate £400 – £600/day
Contract type Contract
Posted 29 September 2026

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About this contract

Contract C# / WPF Windows Application Software Engineer

Location: Derbyshire - Fully Onsite
Contract: Initial 6-12 Months
Day Rate: Negotiable DOE
IR35: Outside IR35
Security Clearance: Current SC or DV Required

We're working with an established technology and engineering business in Derbyshire that is looking to appoint an experienced Windows Application Software Engineer on an initial 6-12 month contract.

You'll join an experienced engineering team working on complex products and systems within a high-integrity environment.

This is a fully onsite assignment due to the nature of the projects and systems involved. There is potential for longer-term work beyond the initial contract based on ongoing project requirements and deliverables.

What You'll Do

* Analyse customer and system requirements and translate them into maintainable software designs.

* Develop Windows applications using C#, WPF/XAML and WinForms.

* Contribute across software development, integration and testing.

* Develop and implement automated unit tests.

* Participate in code reviews and produce appropriate technical documentation.

* Investigate and resolve software issues.

* Work collaboratively within a multidisciplinary engineering team while taking ownership of individual deliverables.

* Produce high-quality software for secure and high-integrity applications.

Essential Skills & Experience

* Strong commercial Windows application development experience.

* C# development.

* WPF / XAML.

* WinForms.

* Cross-platform development using .NET MAUI, Project Uno or similar.

* Source control using Git, SVN or CVS.

* Working knowledge of SQL databases including MySQL, SQLite or similar.

* Understanding of networking protocols including HTTP, SNMP and TFTP.

* Automated unit testing.

* Requirements capture and problem analysis.

* Technical documentation and report writing.

* Strong problem-solving and communication skills.

Desirable Skills

* Embedded C / C++.

* Python, Perl or PowerShell.

* Web front-end development.

* Network security and vulnerability analysis.

* Static analysis tools.

* Software unit test automation tools such as LDRA or Parasoft.

* Previous experience working within Defence, Cyber Security, National Security or other high-integrity environments.

Security Clearance - Applicants must already hold current SC or DV Security Clearance.

Due to the secure nature of the work, candidates without existing clearance cannot be considered for this particular contract assignment.

If you're an experienced C# / WPF Software Engineer with current SC or DV clearance and would like to discuss the assignment, please get in touch for further details

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