Software Engineer

ALTEN; Manchester; On-site; GBP 45,000 - 70,000; Full time

Job summary

ALTEN is seeking experienced Software Engineers in Manchester to support the maintenance of legacy software for underwater defence platforms. This role involves enhancing critical software, implementing unit tests, and collaborating in Agile teams. The ideal candidate has proficiency in C++, Java, or Python along with a solid understanding of software verification in a secure, hands-on environment.

Benefits

Private Medical Insurance

Pension Scheme

Cycle-to-work Scheme

Flexible way of working

Qualifications

• Proficiency in C++, Java, or Python.
• Experience in software configuration management.
• Clear communicator and problem-solver.

Responsibilities

• Maintain and enhance legacy software critical to naval defence platforms.
• Conduct bug fixing and performance improvements in mature codebases.
• Implement unit testing and contribute to wider test strategies.

Skills

C++

Java

Python

Linux

Shell/Bash

Agile methodologies

Git

SVN

JIRA

CI/CD

Education

Bachelor's degree in Software Engineering

Computer Science

Electronics

Job description

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Play a key role in sustaining the software foundations of underwater defence platforms.

ALTEN is seeking experienced Software Engineers to support the maintenance of legacy software product within a complex maritime programme. This is a hands-on opportunity to work with mature, high-assurance software in a secure, agile environment—keeping critical systems operational, supportable, and compliant with evolving standards.

Location: Manchester (On-Site)
Clearance Required: SC Clearable
Experience Level: Mid–Senior (5+ years)

Key Responsibilities:

• Maintain and enhance legacy software, critical to naval defence platforms
• Conduct bug fixing, refactoring, and performance improvements in mature codebases
• Implement unit testing and contribute to wider test strategies for software assurance
• Use JIRA and configuration tools to manage tasks, changes, and releases
• Participate in Agile delivery teams following Scrum, Kanban, or SAFe methodologies
• Collaborate with engineering and project teams to ensure smooth delivery and support

Job Description

Play a key role in sustaining the software foundations of underwater defence platforms.

ALTEN is seeking experienced Software Engineers to support the maintenance of legacy software product within a complex maritime programme. This is a hands-on opportunity to work with mature, high-assurance software in a secure, agile environment—keeping critical systems operational, supportable, and compliant with evolving standards.

Location: Manchester (On-Site)
Clearance Required: SC Clearable
Experience Level: Mid–Senior (5+ years)

Key Responsibilities:

• Maintain and enhance legacy software, critical to naval defence platforms
• Conduct bug fixing, refactoring, and performance improvements in mature codebases
• Implement unit testing and contribute to wider test strategies for software assurance
• Use JIRA and configuration tools to manage tasks, changes, and releases
• Participate in Agile delivery teams following Scrum, Kanban, or SAFe methodologies
• Collaborate with engineering and project teams to ensure smooth delivery and support

Qualifications

Skills & Experience Required:

• Proficient in at least one of: C++, Java, or Python
• Experience with software configuration management and version control practices
• Experience working in Linux-based environments and with Shell/Bash
• Strong understanding of unit testing and general software verification
• Strong working knowledge of Software Configuration Management, using Git or SVN
• Previous exposure to Agile working environments
• Clear communicator with the ability to collaborate and problem-solve within a delivery team

Desirable Experience:

• Proactive, self-starting mindset with the ability to learn on the job
• Familiarity with Jenkins, CI/CD, and basic build automation
• Awareness of security hardening practices (e.g. SELinux) and automated testing
• Exposure to requirements tools like DOORS or Polarion and basic UML/design interpretation

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 backgroundis 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 MedicalInsurance
• Pension Scheme
• Cycle-to-work Scheme among many additional benefits
• Social atmosphere, regular gatherings, and team buildings
• Flexible way of working (role dependent)