Job Vacancy Senior Software Engineer (Back-End)

United Kingdom

CGI

Job position Senior Software Engineer (Back-End)

Permanent

As soon as possible

United Kingdom

Published on 09/04/2026

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At CGI, our Software Engineers deliver impactful, secure, and scalable solutions that enable organisations to transform and thrive in a digital-first world. As we expand our engineering capability across Scotland and Northern Ireland, you’ll play a key role in shaping high-value services, applying modern practices to solve real-world challenges. You’ll work in an environment that encourages ownership, supports continuous growth, and values creative problem-solving, empowering you to build innovative solutions that make a measurable difference for our clients and communities.

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. Our teams operate within a flexible hybrid working model, however on-site requirements vary by project, so the ability to travel as required to meet client needs is essential.

Candidate profile

In this role, you will design, build, and deliver secure, scalable software solutions that underpin critical client services. You’ll take ownership of the full development lifecycle, from architecture and design through to deployment and optimisation, applying modern engineering practices to deliver reliable, high-quality outcomes. Working with technologies such as Java, Python, C#, and .NET, you’ll help shape robust back-end systems and contribute to innovative, cloud-native solutions.

You’ll collaborate with multidisciplinary teams and clients to translate requirements into impactful solutions, bringing fresh ideas while ensuring alignment with business goals. You’ll be supported by a collaborative environment that encourages continuous learning, innovation, and shared success.

Key responsibilities:

• Develop robust back-end services and applications

• Build and integrate RESTful APIs and microservices

• Enhance scalable, distributed systems

• Deliver end-to-end solutions with cross-functional teams

• Ensure quality and security through best engineering practices

• Implement CI/CD pipelines and deployment processes

• Improve system performance and reliability in production

Required qualifications to be successful in this role

You should bring strong software engineering experience with a focus on back-end development, alongside a solid understanding of modern architectures and development practices. You’ll be confident working across one or more technology stacks, with a proactive approach to delivering high-quality, secure solutions in collaborative Agile environments.

Essential qualifications:

• Proven experience as a Software Engineer or Back-End Developer

• Strong proficiency in Java, Python, C#, or .NET

• Experience with frameworks such as Spring or Spring Boot

• Solid understanding of RESTful APIs and microservices architecture

• Experience building scalable, distributed systems

• Familiarity with Agile delivery and CI/CD practices

• Strong problem-solving and collaborative working skills

#LI-JW1

Working environment

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.

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

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Senior Software Engineer (Back-End)

CGI