Senior Software Engineer (C# .NET)

Leonardo UK Ltd; Caddington; Hybrid; GBP 45,000 - 65,000; Full time

Job summary

A leading aerospace and defense company in the UK is seeking a Senior Software Engineer with expertise in C# .NET. This role offers the chance to work on advanced defense technology within a supportive team environment. Candidates should have around 4 years of experience and be enthusiastic about learning and improving processes. Benefits include a competitive perks package, flexible working options, and opportunities for professional growth.

Benefits

Generous leave with up to 12 flexi-days

Award-winning pension scheme with up to 15% employer contribution

Mental health support and financial advice

Access to online courses via Coursera and LinkedIn Learning

Flexible working hours

Qualifications

• Around 4 years of practical experience in software engineering using C# .NET.
• Experience in Agile methodologies and software development lifecycle.
• Ability to work effectively in multi-disciplinary teams.

Responsibilities

• Develop reliable solutions as part of a team.
• Follow best practices and improve processes in a mature development environment.
• Engage in learning and adopting new technologies.

Skills

C# .NET

Agile methodologies

DevSecOps awareness

Object-oriented design

Collaboration

Tools

Visual Studio

WPF

WinForms

Job description

Job Description

Senior Software Engineers (C# .NET) – Capability Green Luton

Your Impact

We are looking for talented Software Engineers with a solid foundation in C# .NET and a passion for learning and growing. If you are eager to develop your technical skills, leadership capabilities, and decision‑making confidence, this role offers an excellent opportunity to advance your career.

What You’ll Bring

Working within our Integrate Mission Solutions sector this role provides an opportunity to work on the latest defence technology within a mature development environment. Key skills and behaviours include:

• Hands on Experience: Around 4 years of practical experience in software engineering using C# .NET, delivering reliable solutions as part of a team.
• Technical Foundations: A good understanding of object‑oriented design and familiarity with frameworks and tools such as WPF, WinForms, and Visual Studio. Exposure to microservices and containerisation is a plus.
• DevSecOps Awareness: Interest in automation across build, test, and deployment processes (CI/CD) and an understanding of Secure by Design principles.
• Lifecycle Knowledge: Experience with the software development lifecycle and Agile methodologies.
• Collaboration & Growth Mindset: Ability to work effectively in multi‑disciplinary teams, share ideas, and learn from others.
• Continuous Improvement: Enthusiasm for adopting best practices and improving processes.

This is not an exhaustive list, and we are keen to hear from you even if you might not have experience in all the above. The most important skill is a good attitude and willingness to learn.

Security Clearance

This role is subject to pre‑employment screening in line with the UK Government’s Baseline Personnel Security Standard (BPSS). An additional range of Personnel Security Controls referred to as National Security Vetting (NSV) may apply, this could include meeting the eligibility requirements for The Security Check (SC) or Developed Vetting (DV). For more information and guidance please visit: https://careers.uk.leonardo.com/gb/en/security-and-vetting

Why join us

At Leonardo, our people are at the heart of everything we do. We offer a comprehensive, company‑funded benefits package that supports your wellbeing, career development, and work–life balance. Whether you’re looking to grow professionally, care for your health, or plan for the future, we’re here to help you thrive.

• Time to Recharge: Enjoy generous leave with the opportunity to accrue up to 12 additional flexi‑days each year.
• Secure your Future: Benefit from our award‑winning pension scheme with up to 15% employer contribution.
• Your Wellbeing Matters: Free access to mental health support, financial advice, and employee‑led networks championing inclusion and diversity (Enable, Pride, Equalise, Armed Forces, Carers, Wellbeing and Ethnicity).
• Rewarding Performance: All employees at management level and below are eligible for our bonus scheme.
• Never Stop Learning: Free access to 4,000+ online courses via Coursera and LinkedIn Learning.
• Refer a friend: Receive a financial reward through our referral programme.
• Tailored Perks: Spend up to £500 annually on flexible benefits including private healthcare, dental, family cover, tech & lifestyle discounts, gym memberships and more.
• Flexible working: Flexible hours with hybrid working options. For part time opportunities, please talk to us about what might be possible for this role.

For a full list of our company benefits please visit our website.

Leonardo is a global leader in Aerospace, Defence, and Security. Headquartered in Italy, we employ over 53,000 people worldwide including 8,500 across 9 sites in the UK. Our employees are not just part of a team—they are key contributors to shaping innovation, advancing technology, and enhancing global safety.

At Leonardo we are committed to building an inclusive, accessible, and welcoming workplace. We believe that a diverse workforce sparks creativity, drives innovation, and leads to better outcomes for our people and our customers. If you have any accessibility requirements to support you during the recruitment process, just let us know.

Be part of something bigger - apply now!

Primary Location

GB - Luton - Cap. Green 300

Contract Type

Permanent

Hybrid Working

Hybrid