Senior Software Engineer

Senior Software Engineer

Position Description
At CGI, our Senior Software Engineers play a pivotal role in delivering the innovative, scalable, and secure solutions that help our clients transform their organisations. Joining our Leeds-based engineering community, you’ll contribute to high-impact projects that shape the future of digital services, applying modern engineering practices to build real-world value. You’ll be part of a collaborative, supportive environment where you can take ownership of your work, explore new approaches, and thrive creatively as you help design and deliver technology that makes a lasting difference.

CGI was recognised in the Sunday Times Best Places to Work List 2025 and has been named a UK ‘Best Employer’ by the Financial Times. We offer a competitive salary, excellent pension, private healthcare, plus a share scheme (3.5% + 3.5% matching) which makes you a CGI Partner not just an employee. We are committed to inclusivity, building a genuinely diverse community of tech talent and inspiring everyone to pursue careers in our sector, including our Armed Forces, and are proud to hold a Gold Award in recognition of our support of the Armed Forces Corporate Covenant. Join us and you’ll be part of an open, friendly community of experts. We’ll train and support you in taking your career wherever you want it to go.

Due to the secure nature of the programme, you will need to hold UK Security Clearance or be eligible to go through this clearance. This is a hybrid position.

Your future duties and responsibilities
In this role, you will design, build, and deliver high-quality software that underpins critical client services. You’ll work across modern technologies such as .NET, Python, and TypeScript(backend programming), contributing to everything from architecture decisions to hands-on development. You’ll collaborate closely with multidisciplinary teams, applying engineering best practice and shaping solutions from concept to deployment.

You’ll take ownership of your work, exploring creative approaches while being supported by experienced engineers who share knowledge, review code, and help you grow. Your contributions will directly influence project success, system performance, and the long-term evolution of key platforms.

• Design & Develop: Build scalable, maintainable solutions using .NET, Python, or TypeScript(backend programming).
• Lead & Contribute: Shape architecture and design discussions to ensure performance, security, and scalability.
• Collaborate & Deliver: Work within Agile teams to plan, estimate, iterate, and deliver value.
• Automate & Optimise: Implement CI/CD pipelines and apply clean code, testing, and automation principles.
• Build & Evolve: Develop APIs, microservices, and web applications, often leveraging cloud environments.
• Coach & Support: Mentor peers and share knowledge through reviews and collaborative engineering practices.

Required qualifications to be successful in this role
To succeed in this role, you should bring strong hands-on software engineering experience, a solid understanding of modern development principles, and the ability to work effectively within collaborative Agile teams. You’ll be confident designing and building solutions across one or more major technology stacks, with a proactive approach to quality, communication, and continuous improvement.

Essential qualifications:

• Experience with .NET/C# or Python or Typescript(backend programming)
• Strong understanding of SOLID principles and clean architecture
• Experience working in Agile environments with CI/CD and automated testing
•Proficiency with Git-based workflows
• Ability to communicate clearly with technical and non-technical stakeholders

Desirable:

• Cloud exposure (Azure, AWS, or GCP)
• Experience with Docker, Kubernetes, Terraform, or Bicep
• Knowledge of event-driven architectures or messaging systems
• Understanding of secure coding practices

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Together, as owners, let’s turn meaningful insights into action.

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.