Job Description

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 - Software Engineering Intern
Start Date - September 2026 for 12 months
Job Location - Farnborough, UK
Job ID - 29857
Please note, applications will close on Friday 31st October.
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 Farnborough specialise in secure ground and airborne communication and network systems for the US military, international forces and commercial customers.
The Engineering Team are responsible for the through-life support of in-service tactical radio products and the development of products and systems to meet next generation customer requirements. The small multi-disciplinary engineering team comprises system, software, hardware and mechanical engineers and we're currently seeking an Undergraduate Software Engineer to join our team for 12 months in 2026.
This is an opportunity to be an integral part of a team involved in the design, development and verification of software updates to in-service radio equipment and next generation products.
The successful individual will be supported to take what they already know and grow with on-the-job training supported by a dedicated Line Manager and Mentor
A few of our employee benefits are:
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
What you can expect:

• Work with the project technical lead to plan out your work.
• Code from existing designs and progress to design and implementation.
• Learn about our product architectures to build your understanding of software development techniques in a real-time environment.
• Prepare and maintain accurate technical documentation, including design descriptions and test reports.
• Work collaboratively with systems, software and other disciplines to ensure successful delivery of secure, reliable and resilient communications systems.

What you'll bring
The role requires the following experience and skills:

• Completed the first 2-years of a Bachelor or Master's degree in Computer Science, Software Engineering or related engineering discipline.
• Proficient with standard office applications (e.g. Microsoft 365) and relevant computer based engineering tools.
• Sound understanding of C++ code development and review.
• Strong analytical and problem solving skills with attention to detail.
• Effective communication skills and ability to work within a multi-disciplinary team.

Desirable:

• Experience of object oriented design and implementation principles
• Linux application and/or driver development experience
• Knowledge of computer networks and automated test environments.

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.

Skills Required