Senior Software Engineer (C# .NET)

Leonardo; Luton; Hybrid; GBP 65,000 - 90,000; Full time

Benefits offered by this job

Flexi-days

Pension up to 15%

Mental health support

Access to 4,000+ online courses

Referral bonus

Private healthcare

Dental and family cover

Tech & lifestyle discounts

Gym memberships

Hybrid working

Job summary

Leonardo UK is seeking Software Engineers to work on defence technology within a mature development environment. The role emphasizes C# .NET expertise, OO design, and collaboration across multi-disciplinary teams in a hybrid setup near Luton.

Candidates should possess ~4 years in software engineering, familiarity with WPF/WinForms/Visual Studio, and an interest in CI/CD and Secure by Design practices.BPSS pre-employment screening applies; flexible benefits and hybrid work are offered.

Qualifications

• Around 4 years of practical experience in software engineering using C# .NET.
• A good understanding of object-oriented design and familiarity with WPF, WinForms, and Visual Studio.
• Exposure to microservices and containerisation.
• Interest in automation across build, test, and deployment processes (CI/CD) and an understanding of Secure by Design principles.
• Experience with the software development lifecycle and Agile methodologies.

Skills

C# .NET

OO design

Agile methodologies

CI/CD awareness

Multi-disciplinary collaboration

Continuous improvement

Tools

WPF

WinForms

Visual Studio

Microservices

Containers

Job description

Job Description

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.

Leonardo UK operates a grade-based salary framework with broad bands. The salary range shown reflects the approved grade band for this role, or a narrower hiring range published within that band, and is benchmarked against the external market. Exceptions above the standard range are managed through governance controls to protect internal equity.

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.

Primary Location

GB - Luton - Cap. Green 300

Contract Type

Permanent

Hybrid Working

Hybrid