Step into the world of autonomous systems and play a key role in shaping the future of naval technology. We’re looking for a Senior Software Engineer to help push the boundaries of what’s possible, working on a unique synthetic validation environment that tests and proves ship avoidance algorithms in thousands of complex scenarios. This is your chance to take on real engineering challenges, influence the design of safety-critical systems, and see your work directly impact the next generation of defence technology.

Key Details:

Location: Bristol (Primary) Manchester (Secondary), 3 days per week on site. 
Clearance: Must be SC Clearable (no caveats)
Experience Level: Senior (8+ years)

Key Responsibilities:

• Document and maintain requirements, architectural designs, and IVVQ procedures for a synthetic validation tool
• Implement new software features and resolve problem reports in alignment with the systems engineering team
• Support scenario construction and system operation to validate autonomous manoeuvring software against COLREGs rules
• Contribute to the design, configuration, and testing of C++ applications across complex software environments
• Work collaboratively within a cross-functional project team, supporting wider software testing activities
• Apply strong communication skills to share knowledge and ensure high-quality delivery across the software lifecycle

Required Skills:

• Proficiency in C++ development for complex software systems
• Experience with software configuration management and version control
• Familiarity with JIRA for change and task management
• Broad software test exposure across development lifecycles
• Strong written and verbal communication skills
• Ability to work effectively as part of a collaborative team

Required Qualifications:

• Must be eligible for UK Security Clearance (SC)
• A Bachelor’s degree in Computer Science, Software Engineering, Electronics, or a related field
• OR A relevant background in UK Armed Forces with proven C++ software experience

Desirable Skills:

• DevOps experience and knowledge of Linux-based infrastructure
• Experience with requirements management tools such as DOORS or Polarion
• Awareness of automated testing approaches and tools
• Familiarity with UML modelling and clear software design communication
• Experience with VR-Forces (scenario construction or interfacing)

Why join us? 

We foster a community of dually talented individuals who are both entrepreneurs and technology specialists. Our teams embody the spirit of innovation and entrepreneurship, enabling us to develop solutions most efficiently. 

Our commitment to sustainable growth is unwavering, and we continuously strive for accelerated transformation and continuous improvement. Through ALTEN labs, mentoring programs, internal universities, and more, we are always pushing boundaries and embracing new possibilities. 

We offer incredible opportunities to join inspiring projects in the most innovative companies. 

We prioritise your career development with personalised support plans tailored to your own aspirations. We're here to empower you and help you reach your full potential. 

Join our passionate team and start building tomorrow, today! 

In short you get: 

• A personalised career path and a rewarding management style 
• A chance to work on the most exciting engineering projects and technologies along with Premium Customers
• A huge diversity of engineering projects and industries
• A competitive salary
• Private Medical Insurance
• Pension Scheme
• Cycle-to-work Scheme among many additional benefits
• Social atmosphere, regular gatherings, and team buildings
• Flexible way of working (role dependent)