L3Harris Technologies
C++ Software Engineer
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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 programs 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.
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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 programs.
- Work closely with integration and test teams to resolve issues and support program delivery.
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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.
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