Senior Software Engineer

Job Title\: Senior Software Engineer

Location\: Portsmouth Broad Oak - On Site

We offer a range of hybrid and flexible working arrangements - please speak to your recruiter about the options for this particular role

Referral Bonus\: £2,000

Grade\: GG10

You’re expected to have completed 12 months in role prior to applying for an advertised vacancy and you should also discuss the internal opportunity with your line manager to ensure sustained business continuity and to further support your career development.

We know there may be exceptional individual circumstances that impact this, in the first instance please discuss this with your line manager.

If you don’t feel you can talk to your line manager, you can contact your HRBP.

PLEASE NOTE\: Should you be invited for interview; you acknowledge that the Recruitment team will contact you and your line manager regarding your application for this opportunity.

Job Description\:

Working within a multidisciplinary engineering team developing and enhancing advanced maritime simulation software used for naval training, operational concept development, and system testing. You will play a key role in modelling complex battlespace environments and defence systems, enabling engineering teams to validate capabilities within safe, realistic scenarios. This role offers the opportunity to improve simulation performance, enhance operational readiness, reduce development risk, and accelerate delivery of critical capabilities using modern software engineering and simulation technologies.

Core duties\:

• You will design, develop, and maintain high-quality software solutions in line with project requirements
• You will produce clear, well-structured, and maintainable software designs
• You will deliver robust and reliable software solutions suitable for operational use
• You will undertake testing activities to ensure software quality, performance, and compliance
• You will maintain and enhance existing software, resolving defects and implementing new features

Essential Skills\:

• You will hold a degree (BEng/BSc) in Computer Science, Engineering, or a related numerate discipline
• You will have proven experience in at least one high-level programming language; C++, C#, Java, or Ada are highly desirable
• You will have adequate experience across the full software development lifecycle, with knowledge of methodologies such as Agile and Waterfall
• You will have a solid understanding of configuration management principles, with experience using configuration management tools
• You will have knowledge of networking concepts, including switches and routers

The MIMESIS Team\:

The MIMESIS Product Team develops advanced maritime battlespace simulation software, modelling environmental conditions, platform behaviour, and complex systems such as sonar, radar, and weapons. The team supports naval training, system validation, and capability development through realistic, high-fidelity simulation.

Why BAE Systems?

Here you’ll build a career with purpose and limitless possibilities. With lifelong learning and meaningful work, this is a place where you can grow your career with confidence and be empowered to be your best. You’ll be recognised for your contribution and enjoy rewards tailored to what’s most important to you and your family, support for your financial and personal wellbeing, as well as a balanced lifestyle. In an environment embracing sustainable ways of working and with a strong sense of shared purpose, our supportive culture is a place you can feel you belong and proud of the difference you make.

A place where everyone can thrive\:

We’re committed to building an inclusive workplace where everyone feels valued and supported. We know that a diversity of backgrounds, perspectives and experiences strengthens our teams and is vital to the work we do.

We welcome applications from all suitably qualified people, who are BAE Systems employees and have been in their current role for 12 months or longer.

Please be aware that many roles at BAE Systems are subject to both security and export control restrictions. These restrictions mean that factors such as your nationality, any nationalities you may have previously held, and your place of birth can restrict the roles you are eligible to perform within the organisation. All applicants must as a minimum achieve Baseline Personnel Security Standard. Many roles also require higher levels of National Security Vetting where applicants must typically have 5 to 10 years of continuous residency in the UK depending on the vetting level required for the role, to allow for meaningful security vetting checks.

Closing Date\: 23rd September 2026