Principal Software Engineer (ADA/C#.NET)

CBSbutler; Luton; Hybrid; GBP 80,000 - 100,000; Full time

Job summary

A leading engineering consultancy is seeking a Principal Software Engineer skilled in Ada and C# .NET to contribute to defense technology projects. The role requires expertise in real-time embedded software development, collaboration with engineering teams, and experience in adopting verification techniques. This is a hybrid position available in Luton, offering a competitive day rate for a contract duration of 12 months. Immediate start subject to security clearance and onboarding.

Benefits

Hybrid working model

Opportunity for contract extension

Immediate start

Qualifications

• Expert knowledge of the Ada software language including OO design principles.
• Experience of debugging in embedded real-time environments.
• Knowledge of Verification & Validation techniques.

Responsibilities

• Support specification, design, coding and testing of software.
• Take ownership of complex tasks across full software lifecycle.
• Collaborate with engineering teams on solution development.

Skills

Expert knowledge of Ada

Debugging in embedded real-time environments

Good knowledge of UML

Expert knowledge of V&V techniques

Experience of requirements engineering

Tools

Dimensions

DOORS

Rhapsody

VxWorks

AdaCore GNAT Pro

VectorCAST

Job description

Principal Software Engineer (ADA/C# .NET)

Please note we can only consider sole UK Nationals for this role

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

Contract: 12 months

IR35: Inside IR35

Security Clearance: Full UK SC required

Day Rate: £70ph - £75ph

About the Role

A real-time embedded software engineer with knowledge of Ada/C# .NET is required in support of defensive aids development programmes within the Electronic Warfare business. The role includes design, development, test and support of current and future programs across our Praetorian product line.

What You’ll Do

• Support the specification, design, coding and testing of complex real-time embedded software in Ada producing mission critical quality software, to high integrity levels, company standards and customer requirements.
• Take ownership of complex tasks across the full software lifecycle from requirements to integration, testing and delivery.
• Collaborate with hardware, firmware, and systems engineering teams, working closely across disciplines to develop robust solutions whilst maintaining independence in your work.

What We’re Looking For

• Expert knowledge of the Ada software language including OO design principles.
• Expert capability in debugging in an embedded real-time environment with a COTS RTOS.
• Good knowledge of UML.
• Expert knowledge of a variety of Verification & Validation techniques, and the value of each.
• Experience of requirements engineering, hands‑on integration and target testing.
• Good knowledge of developing software within a mature development process framework.

Desirable

• Defence / EW business domain experience.
• Experience of Dimensions, DOORS, Rhapsody, VxWorks, AdaCore GNAT Pro & VectorCAST.
• Experience and understanding of development to RTCA/DO‑178B or equivalent standards

Why This Contract?

• Immediate start (subject to onboarding and SC Clearance).
• 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.