About this role
Company 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!
Job Description
Join our team to deliver high-impact Defence software solutions for mission-critical systems. You’ll work on projects requiring robust, safety-regulated software development, applying your expertise in C++ and compliance standards to ensure reliability and security. This is an opportunity to contribute to fast-paced defence programmes, where your work directly supports operational capability.
Location: London (EC2)
On-site: Hybrid (3 days per week)
Seniority: Senior (8+ years of experience)
Clearance: SC Clearance
Key Responsibilities
- Design, develop, and maintain C++ software for mission-critical defence systems.
- Apply DO-178 principles and ensure compliance with safety standards.
- Perform black-box/system-level testing and verification activities.
- Collaborate with multi-disciplinary teams to integrate software into complex systems.
- Support configuration management and CI/CD processes (Git, Jenkins, CMake).
- Produce clear technical documentation aligned with regulated environments.
Qualifications
Required Skills
- 8+ years of proven experience in C++ (modern standards: C++11/14/17/20).
- Knowledge of DO-178 processes and safety-critical development.
- Experience with black-box testing, verification, and requirements traceability.
- Familiarity with configuration management and build tools (Git, Jenkins, CMake).
- Understanding of coding standards (e.g., MISRA, CERT C++).
Soft Skills & Collaboration
- Excellent communication skills for cross-functional collaboration.
- Strong problem-solving and adaptability in regulated environments.
- Ability to work effectively in multi-disciplinary teams.
- Proactive approach to continuous improvement and quality assurance.
Required Qualifications
- Bachelor’s or Master’s degree in Software Engineering, Computer Science, or related discipline or relevant technical military background with equivalent experience.
- Must be eligible to hold or already hold UK SC Security Clearance.
Desirable Skills
- Exposure to RTOS, Linux, or embedded systems.
- Knowledge of ADA programming language in embedded systems
- Familiarity with requirements tools (e.g., DOORS).
- Background in defence, aerospace, or safety-critical domains.
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.
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.
Other facts
About ALTEN
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ALTEN is committed to meeting the expectations of its stakeholders and anticipating their requirements in the fields of innovation, R&D, and technological information systems.
Founded in 1988 and present in 30+ countries, the Group has established itself as the global leader in Engineering and IT Services. ALTEN operates with major players in the Aeronautics, Space, Defence, Naval & Security, Automotive, Rail & Mobility, Energy & Environment, Life Sciences β Health, Industrial Equipment & Electronics, Telecoms, Banking, Finance & Insurance, Retail & Services, Public Services & Government sectors.
OUR VISION: BUILDING TOMORROWβS WORLD TODAY
We are convinced that engineers are the architects who build tomorrowβs world today. As a global leader in Engineering and IT Services, we support businesses in their technological and sustainable transformation. We commit to making a positive impact over time and on people, pushing the boundaries of innovation, and always staying one step ahead. We are driven by one ambition: to think about the future in the present.
A LEADING GLOBAL TECHNOLOGY PARTNER
ALTEN is involved in all projects with a technological dimension for the Technical, Research & Development Divisions and IT Systems Divisions of major corporate, telecoms and service clients, requiring the involvement of high-level Consultant-Engineers. To achieve this, the Group has put in place a world-renowned technical organization of excellence.
πΉ 12 Industries covered
πΉ 21 Delivery Centers
πΉ 6,500+ Clients
FULL COVERAGE OF TECHNOLOGIES
The Group covers a wide range of expertise in Engineering and IT Services in order to meet our clientsβ needs.
We bring together and coordinate at the transnational level, specialists and consultants, experts in their profession who support our clients in their issues of digital transformation, innovation, product development, supply chain, etc.
What you'll do
- The role involves designing, developing, and maintaining C++ software specifically for mission-critical defence systems, ensuring compliance with safety standards like DO-178 principles. Responsibilities also include performing system-level testing, integrating software into complex systems, and supporting configuration management and CI/CD pipelines.
Ready to join ALTEN?
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