L3Harris is dedicated to recruiting and developing high-performing talent who are passionate about what they do. Our employees are unified in a shared dedication to our customers’ mission and quest for professional growth. L3Harris provides an inclusive, engaging environment designed to empower employees and promote work-life success. Fundamental to our culture is an unwavering focus on values, dedication to our communities, and commitment to excellence in everything we do.
L3Harris Technologies is the Trusted Disruptor in the defense industry. With customers’ mission-critical needs always in mind, our employees deliver end-to-end technology solutions connecting the space, air, land, sea and cyber domains in the interest of national security.
Job Title – Graduate Software Engineer
Start Date – September 2026
Job Location – Tewkesbury, Gloucestershire
Job ID – 28760
About this opportunity and L3Harris UK
From 11 UK sites, our team of nearly 1,000 people delivers unique capabilities across space, air, land, sea and cyber for military, security and commercial customers across the UK and worldwide.
L3Harris in Tewkesbury is our HQ for our Intelligence & Cyber International division. In the land domain, our T7 and T4 multi-mission robots deliver next-generation remote capabilities and uncompromised performance. We design and manufacture world-leading land force protection systems, cyber and electromagnetic activities (CEMA), electronic warfare (EW) and encryption capabilities. Our cyber capabilities provide an information advantage in the fields of kinetic conflict, cyber warfare, force protection and counterterrorism.
We are seeking Graduate Software Engineers to join our team working on next-generation Information Resilience and Electronic Warfare technology. You will be an integral part of a team involved in the design, development and verification of complete systems of products such as the CATAPAN and Corvus product families, along with other products and systems we develop.
Working with a Technical Lean in Agile sprints, some of your responsibilities will include coding from existing requirements and designs (to begin with) and progressing to updating and developing requirements, design and implementation as you become more proficient. You’ll also learn about our product architectures to build your understanding to apply your own ideas, manage your own time and workload and stay up to date with new technologies, methods and languages using both the L3Harris online resources and publicly available resources.
A few of our employee benefits are:
- Hybrid working where possible – please note, the business expectation is 65% of your working time should be spent onsite over a one-month period.
- Half day finish on a Friday
- 25 days holiday per year (plus bank holidays), increasing with long service and with the opportunity to buy/sell up to 5 days
- Private medical insurance with optional family cover
- Pension scheme of up to 7% employer contribution
- Life Assurance 4x salary (flexible up to 10x)
- Group income protection
- Flexible opt-in extras such as a health care cash plan, dental insurance, gym membership, critical illness cover and cycle to work scheme
- Employee assistance program providing mental health and wellbeing support
- Professional membership reimbursement
- Employee Resource Group support
What you can expect:
- Immersive induction into L3Harris – who we are and how we work
- Structured technical training programme delivered through the School of Systems Engineering
- Personal development workshops to support your career progression
- A dedicated support structure with a peer buddy, your manager, a project mentor and our Early Careers Lead
- Membership to our internal Early Careers network, Cerebrum, and other Employee Resource Groups to build your community
- Funded IET membership and the opportunity to work towards professional registration
What you’ll bring
The role requires the following experience and skills:
- 2:1 or above in Computer Science/Software Engineering or equivalent
- Experience with C and/or C++ is ideal
- Additionally, experience with Python, Rust and/or C# is advantageous
- Experience of object orientated design and implementation principles
- Appreciation of Continuous Integration and DevOps tools such as GitLab/Jenkins
- Willingness to learn and tenacious approach to problem solving
- Strong interpersonal skills and a self-starter – able to work as part of a team as well as using your own initiative
- A demonstrable passion for technology keeping up to date with latest innovations
Important to know
Due to the nature of our work many our roles require a UK nationality and the ability to obtain a security clearance. Applicants who accept a conditional offer of employment must meet the requirement of right to work in the UK and must meet eligibility requirements for access to classified information and will be subject to government security checks.
L3Harris Technologies is proud to be an Equal Opportunity Employer. We are committed to maintaining a workplace that is free from unlawful discrimination and offers equal opportunities for all. Applications from individuals are encouraged regardless of age, disability, sex, gender reassignment, sexual orientation, pregnancy and maternity, race, religion or belief, and marriage and civil partnerships.