Quality Assurance jobs in United Kingdom

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 Engineer

Job Location – Tewkesbury, UK

Job ID – 29049

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 mid-level to experienced Software Engineers with a passion for software engineering and a proven track record of technical excellence to design and develop innovative, cutting-edge systems. This role offers the opportunity to be a hands‑on Software Engineer helping to create software solutions that prioritise performance, reliability, and scalability.

You will use your experience to contribute to our Information Resilience portfolio and although hybrid working may be available in the future, it is not guaranteed and due to the secure nature of the Information Resilience portfolio work, you will be based full‑time onsite at our Tewkesbury facility.

We welcome applications from individuals who bring diverse skills and experiences. If you are passionate about this role and believe you can make a meaningful contribution, we encourage you to apply, even if you don’t meet every requirement. We value a commitment to growth and are open to potential.

The ability to achieve SC clearance is a minimum requirement of this role, and DV clearance may be required depending on the specific projects to which the successful applicant is assigned.

• £3,000 to £6,000 DV Bonus – please note this level of clearance isn’t essential for this role. This bonus is subject to individual clearance and project requirements – discussed upon application.
• Flexible or part‑time working arrangements considered upon request.
• 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 4× salary (flexible up to 10×).
• 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 (discretionary).

The responsibilities of your role will include the following:

• Applying your software skills as an individual contributor to help develop complex software systems.
• Collaborating with cross‑functional teams to define functional and non‑functional requirements for embedded and/or user interface software projects.
• Creation of low‑level designs, implementation and test solutions, in line with the defined architecture.
• Supporting and promoting adherence to coding standards, best practices, planning documentation, procedures for software development and delivery, and continuous improvement initiatives.
• Providing guidance and mentorship to software engineers.
• Meeting cost and schedule targets while contributing to technical reviews, bids & proposals, budget & schedule discussions, customer engagement activities.

The role requires the following experience and skills:

• Proficiency in C++, specifically embedded software development using C++.
• Experience of other languages such as Python, C#, Rust, C.
• Experience of using version control systems (e.g. Git / GitLab or similar).
• Strong object‑oriented design and programming skills (OOD, OOP).
• Familiarity with development methodologies (e.g. V‑model, Waterfall, Agile).
• Proficiency with tools like Jira, Confluence, Mantis.
• A proven track record of delivering reliable, maintainable software across the lifecycle, including peer review.
• Strong communication, documentation and organisational skills.
• A degree (or equivalent experience) in Computer Science, Software Engineering, or a related field.

Due to the nature of our work many of 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.

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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.