Software Developers

As a Software Developer, you’ll contribute across the full software development lifecycle, working within multidisciplinary teams to deliver secure solutions for our defence and intelligence clients.

You will:

Design, develop and maintain secure, scalable software applications.

Work across the full development lifecycle, from concept through to deployment and support.

Collaborate closely with architects, engineers and client stakeholders to solve complex technical challenges.

Build modern cloud-native applications using contemporary development practices.

Improve existing systems through performance optimisation, automation and continuous improvement.

Support live environments, troubleshooting issues and delivering enhancements.

We’re looking for collaborative Software Developers who enjoy solving challenging technical problems and are passionate about delivering high-quality software. You’ll be comfortable working across multiple technologies and committed to continuous learning within a fast-paced, agile environment.

Experience in some of the following areas is desirable:

~Strong programming fundamentals with experience in one or more languages such as Java, Python or Rust.

~Experience designing and developing secure, scalable and maintainable software solutions.

~Front-end development using frameworks such as React, Angular or Vue.js.

~Modern DevOps practices including GitLab CI/CD, automation and continuous integration.

~Infrastructure as Code using technologies such as Terraform or Ansible.

~Containerisation and orchestration using Docker and Kubernetes.

~Experience working with AWS or other cloud platforms.

~Agile software delivery methodologies including Scrum or Kanban.

~Strong communication skills with the ability to collaborate effectively across technical teams and clients.

At CGI, we don’t just build software, we engineer secure, mission-critical systems that help protect the UK and support some of its most critical national infrastructure.

As a Software Developer, you’ll join the Space, Defence and Intelligence business unit, working alongside clients to design, build and evolve complex software solutions that solve real-world challenges. You’ll work with modern technologies, agile delivery practices and highly skilled teams to deliver systems that are secure, scalable and built to last.

This is an opportunity to work on technically challenging programmes where innovation is encouraged, learning is continuous, and your work has genuine impact.

CGI has been recognised in the Sunday Times Best Places to Work 2025 and named one of the World’s Best Employers by Forbes. As a CGI Partner, you’ll benefit from industry-leading training, a collaborative culture and our unique share ownership scheme because here, you’re more than an employee.

The role requires you to hold of obtain UK Security Clearance, the role will be based on a secure site., Life at CGI is rooted in ownership, teamwork, respect and belonging. Here, you’ll reach your full potential because…

You are invited to be an owner from day 1 as we work together to bring our Dream to life. That’s why we call ourselves CGI Partners rather than employees. We benefit from our collective success and actively shape our company’s strategy and direction.

Your work creates value. You’ll develop innovative solutions and build relationships with teammates and clients while accessing global capabilities to scale your ideas, embrace new opportunities, and benefit from expansive industry and technology expertise.

You’ll shape your career by joining a company built to grow and last. You’ll be supported by leaders who care about your health and well-being and provide you with opportunities to deepen your skills and broaden your horizons.

That same commitment to fairness extends to how we use technology. To support our recruitment team, AI tools may be used to help assess applications though they never replace human judgement. All hiring decisions remain entirely in the hands of our recruitment professionals.

Come join our team-one of the largest IT and business consulting services firms in the world.

Discover CGI

London, England, United Kingdom > 1000 employees IT services We are a global business with 91,500 professionals across hundreds of locations worldwide, providing end-to-end IT and business process services that drive our clients’ businesses. In the UK alone, we have around 6,000 member-partners working across 19 towns and cities, doing everything from writing complex code to designing sophisticated software solutions. The work we do powers some of the most ambitious projects that touch the lives of many. Our approach sets us apart, characterised by our proximity model, international presence, expertise, and operational excellence. We organise our operations within metro markets where our clients have concentrated footprints, empowering our local teams to build trusted, in-person relationships. As you build your career here, you’ll develop your skills, share your insights, and work side-by-side with colleagues and clients on innovative solutions that address the most complex issues. Our commitment to ownership, flexibility, and being approachable makes us easy to do business with. Join us, and together, as owners, let’s turn meaningful insights into action to meet the needs and balance the interests of our clients, shareholders, communities, and each other. Benefits: - Insurance coverage - Medical benefits - Pension plan - Member Assistant Programme - Check4Cancer - Flexible time off - Share Purchase Plan - Member discounts - Dental benefits - Vision benefits - Profit Participation Plan - Health and Wellbeing Programme