Job Description

ALTEN is a global engineering and technology consultancy operating across over 35 countries worldwide. We partner with industry leaders across sectors including Aeronautics, Aerospace, Defence, Naval, Automotive, Energy, Rail, IT and many more to deliver innovative engineering solutions that drive technological advancement & support sustainable transformation.

Our teams of passionate and agile engineers work on cutting-edge projects that shape the future of technology and sustainability. At ALTEN, we empower talented engineers to innovate, solve complex challenges, and deliver impactful solutions that build tomorrow’s world—today.

Join us and start building tomorrow’s world today!

Join our team to play a pivotal role in developing cutting-edge underwater defence systems that rely on advanced signal processing and mathematical modelling You’ll help translate theoretical models into high-performance, safety-critical software deployed in real-world maritime environments. This is a hands-on opportunity to work on some of the UK’s most innovative defence software projects, where your C++ expertise and algorithmic thinking will make a direct impact.

Location: Stockport (Manchester)
On-site: 4-5 Days per week
Seniority: Senior (7+ years’ experience)
Clearance: Candidates must be willing and eligible to obtain SC clearance.

Key Responsibilities

• Develop and integrate complex signal processing models into reliable, high-performance C++ software solutions
• Translate mathematical and algorithmic models into efficient, production-quality code.
• Contribute to model-driven engineering, combining both autogenerated and manually written code.
• Validate algorithms through MATLAB/Simulink simulation.
• Design and maintain robust software architectures using UML modelling tools (e.g. IBM Rhapsody).
• Apply best practices in static analysis, clean coding, and version control to ensure maintainable, safety-critical software.
• Support continuous improvement across build pipelines, testing, and software assurance activities.

Qualifications

Required Skills

• Strong proficiency in C++, with proven experience in complex, real-time or safety-critical environments.
• Solid grounding in mathematics and signal processing, with practical implementation experience.
• Hands-on knowledge of Linux development, including scripting and system configuration.
• Experience with model-driven development and integration of both generated and hand-written code.
• Strong understanding of software build pipelines, configuration management (e.g. Git, Jira), and containerisation (e.g. Docker).
• Familiarity with software testing, including unit testing, integration, and code validation
• Understanding of software safety compliance, documentation standards, and continuous integration practices.

Soft Skills & Collaboration

• Excellent teamwork and communication across multi-disciplinary environments.
• Strong leadership presence – mentoring peers and influencing technical direction.
• Proactive and adaptable mindset, with a commitment to quality and safety-critical delivery.

Required Qualifications:

• A Bachelor’s or Master’s degree in Engineering, or a relevant technical military background with equivalent hands-on engineering experience.
• Must be eligible for or already hold UK Security Clearance (SC)

Desirable Skills

• Familiarity with defence domain projects and compliance standards.
• Experience with CI/CD, DevOps, or software assurance in secure environments.
• Knowledge of cybersecurity concepts, virtualisation, or infrastructure as code
• Exposure to requirements management tools and automated testing frameworks.
• Continuous improvement mindset, with an interest in emerging technologies and process innovation.

Additional Information

Why join us?

We bring together entrepreneurial, tech-driven people to deliver innovative solutions for leading companies.

At ALTEN, you’ll work on exciting projects, supported by ongoing learning, mentoring, and clear career development tailored to your goals.

Join a passionate team and help build tomorrow, today.

In short you get:

• A personalised career path and a rewarding management style
• A huge diversity of engineering projects and industries
• Private Medical Insurance
• Cycle & Tech Scheme
• Employee assistance programme
• Life insurance & Pension Scheme
• Social atmosphere, regular gatherings & team buildings
• Flexible way of working (role dependent)

We are proud to support the Armed Forces Covenant & actively encourage applications from members of the Armed Forces community, including veterans, reservists, service leavers, and military spouses/partners. We recognise the value of military skills and experience and are committed to ensuring that no applicant is unfairly disadvantaged during our recruitment and selection processes.

ALTEN is committed to fostering a diverse and inclusive workplace and values the strength that comes from a global mix of backgrounds and perspectives. We welcome applications from all suitably qualified candidates, regardless of background or protected characteristics under the Equality Act 2010. If you require any reasonable adjustments during the recruitment process, please let us know.

This role may require you to have or be willing to go through Security Clearance. As part of the onboarding process candidates will be asked to complete a Baseline Personnel Security Standard; details of the evidence required to apply may be found on the government website Gov.UK. If you are unable to meet this and any associated criteria, then your employment may be delayed, or rejected . Details of this will be discussed with you at interview.