Step Forward With Us

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 is the Trusted Disruptor in defense tech. 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 – C++ Software Engineer

Job Location – Portchester, UK

Job ID – 44403

About this opportunity and L3Harris UK

Operating at 10 sites in the United Kingdom, L3Harris supports Britain's mission to secure and strengthen the country by delivering sovereign innovation across the space, air, land, sea and cyber domains.

L3Harris in Portchester is part of our Maritime UK business - a leading global supplier of integrated marine control systems and simulation products for warships, submarines and high-end commercial marine vessels worldwide. Our Maritime UK business has 4 UK locations and together we are powering the Royal Navy’s adoption of autonomous surface vehicle technology as well as delivering autonomous capability to UK ports, harbours and offshore energy service providers.

Join our Maritime Global Systems team and play a key role in delivering next-generation digital maritime solutions across vessels and offshore assets worldwide. We are seeking a skilled Software Engineer with experience in C++ development and exposure to Ruby to join our growing ASV Software Engineering team. The successful candidate will contribute to the design, development, integration, and sustainment of software solutions supporting maritime autonomy, collision avoidance systems, and other mission-critical applications. Working within a collaborative Agile environment, the role will support both current programmes and future technology development initiatives, including IRAD activities and customer-funded projects. The position offers the opportunity to work across the full software lifecycle while contributing to innovative maritime technologies.

A few of our employee benefits are:

• Hybrid working where possible, three days onsite per week
• 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 8% 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, cycle to work scheme, travel insurance and electric car scheme
• Employee Family Assistance Program providing mental health and wellbeing support
• Professional membership reimbursement (discretionary)

What the role will involve

The responsibilities of your role will include the following:

• Design, develop and maintain software applications using C++ and Ruby.
• Support Collision Avoidance (CA), autonomy and other maritime software development activities.
• Contribute to software architecture, implementation, integration, testing and sustainment activities.
• Collaborate with systems engineers, UX designers, QA engineers and product stakeholders to deliver high-quality software solutions.
• Participate in Agile software development processes, including sprint planning, reviews and retrospectives.
• Utilise JIRA and related development tools to manage tasks and track progress.
• Contribute to Qt-based user interface development where required.
• Develop and support software solutions within Linux (RHEL 8) environments.
• Support IRAD activities, prototyping, technology development and future customer programmes.
• Work closely with integration and test teams to resolve issues and support programme delivery.

What you’ll bring 

The role requires the following experience and skills:

• Bachelor’s degree in Computer science, Software Engineering, or equivalent practical experience.
• Professional experience in C++ software development.
• Experience with Ruby development or willingness to develop Ruby expertise.
• Experience working within Agile software development teams.
• Familiarity with JIRA or similar issue tracking and project management tools.
• Experience working within Linux environments, preferably RHEL 8.
• Strong problem-solving, communication and teamwork skills.
• Ability to work across multiple projects and technical domains.

Preferred Additional Skills:

• Experience with the Qt framework for GUI development.
• Understanding of UX principles and user-centred design.
• Experience with maritime software systems, autonomy or collision avoidance technologies.
• Experience with embedded or real-time software development.
• Experience supporting IRAD or research and development activities.
• Familiarity with DevOps practices, CI/CD pipelines and automated testing approaches.

Important to know

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.

#LI-Hybrid

#LI-RT1

#SpecialistSoftwareEngineer

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.