Principal Software Engineer

Synergize Consulting Ltd; Luton; Hybrid; GBP 150,000 - 180,000; Full time

Job summary

Synergize Consulting Ltd in the United Kingdom is seeking a Contract Software Engineer to deliver robust C# .NET solutions in a Windows environment. The role is hybrid, based in Luton, with on-site four days and one remote day, and offers a 12-month contract inside IR35.

You will take ownership of tasks across the full software lifecycle, apply OO design and modern development practices, and collaborate with a skilled team while maintaining independence to produce high-quality software for

Qualifications

• Proven experience delivering C# .NET web-based applications.
• Strong OO design and experience across full software lifecycle.
• Experience with CI/CD and automated testing.
• Familiarity with Agile methods and microservices.

Responsibilities

• Develop robust C# .NET applications within a Windows environment.
• Own complex tasks from requirements to delivery.
• Apply OO design and verification techniques.
• Collaborate with team while maintaining independence.

Skills

C# .NET

Web-based apps

OO design

CI/CD

Agile (Scrum/Kanban)

Microservices

Automated testing

Azure DevOps

Visual Studio

Tools

WPF

WinForms

DOORS

Cameo

Azure DevOps

Visual Studio

Job description

Contract Software Engineer (C# .NET)

Location: Luton (Hybrid: 4 days on-site, 1 day remote)

Contract: 12 months

IR35: Inside IR35

Security Clearence: Full UK SC required

Rate: £77/hr

About the Role

We need experienced C# .net developers who can work with the minimum of supervision to deliver current and future programs. Working within our Integrate Mission Solutions sector of the Electronic Warfare Line of Business this role provides an opportunity to work on the latest defence technology within a mature development environment.

What You’ll Do

• Develop robust applications using C# .NET within a Windows environment.
• Take ownership of complex tasks across the full software lifecycle—from requirements to integration, testing and delivery.
• Apply object-oriented design principles and verification/validation techniques.
• Collaborate with a skilled team while maintaining independence in your work.

What We’re Looking For

• Proven experience in C# .NET development including Web Based applications.
• Strong understanding of object-oriented design and software development methodologies.
• Experience across the full software lifecycle including automated testing frameworks and practices.
• Experience of Continuous Integration / Continuous Delivery (CI / CD) practices.
• Ability to work independently and deliver high-quality solutions with minimal supervision.
• Experience with Agile methodologies (Scrum, Kanban) and microservices architecture.

Desirable:

• Defence or Electronic Warfare domain experience.
• Familiarity with frameworks/tools such as WPF, WinForms, Visual Studio.
• DOORS, Cameo, and Azure DevOps.
• Some C++ experience.

Why This Contract?

• Immediate start (subject to onboarding and SC Clearence).
• Hybrid working model for flexibility (4 days on-site, 1 day remote).
• Opportunity to work on innovative defence technology with a high degree of autonomy.
• Long-term project with strong potential for extension.