Senior Infrastructure Software Engineer

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Company Description

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Job Description

Play a key role in delivering the software infrastructure behind next-generation underwater defence systems.

ALTEN is seeking experienced Infrastructure Software Engineers to support the development and maintenance of key components within a complex maritime platform. You'll work on high-assurance systems such as Nemesys, Audio, and KAST, contributing to the evolution of defence-grade software by managing configuration, technical debt, and supporting legacy modules like Template RTE and UPFW.
This is a hands-on opportunity to influence how critical systems are built, maintained, and deployed-while working in a secure and agile environment.

Location: Manchester (On-Site)
Clearance Required: UK Nationals only / SC Clearable
Experience Level: Senior (5+ years)

Key Responsibilities:

• Deliver and maintain infrastructure components critical to naval defence platforms.
• Support and refactor legacy modules and frameworks including Template RTE and UPFW.
• Work within an Agile team to design, develop, test, and deploy resilient infrastructure software.
• Contribute to configuration management, unit testing, and automated CI/CD pipelines.
• Collaborate with cross-functional teams to implement secure, container-ready applications.
• Use Jira and other tools for change and task management in a Scaled Agile environment.

Qualifications

Skills & Experience Required:

• Proficient in Java, C++, or Python (at least one to a competent level).
• Strong understanding of software configuration management and build tools like Jenkins or Git Runners.
• Experience with unit testing and wider software verification techniques.
• Comfortable working in Agile teams (Scrum, Kanban, or SAFe).
• Good communicator with the ability to contribute effectively as part of a delivery team.

Desirable Experience:

• Proactive, self-driven mindset with the ability to pick up skills on the job.
• Experience with web services, containerisation (Docker, Podman), and Kubernetes orchestration.
• Familiarity with the CNCF ecosystem, CI/CD, and Infrastructure as Code (IaC) using Ansible.
• Solid scripting skills in Shell, Bash, or Python.
• Understanding of security hardening (e.g., SELinux), automated testing, and certification policies.
• Awareness of DOORS, Polarion, UML, and software architectural principles.
• Linux system-level experience, particularly within high-integrity environments.

Qualifications:

• A Bachelor's degree (minimum) in Software Engineering, Computer Science, Electronics, or similar technical field.
• Experience from the UK Armed Forces with an applicable software background is equally valued.
• Additional certifications or training in secure coding, embedded systems, or real-time OSs is a plus.

Additional Information

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)

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