Job Vacancy Senior Full-Stack Developer

United Kingdom

CGI

Job position Senior Full-Stack Developer

Permanent

As soon as possible

United Kingdom

Published on 09/04/2026

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At CGI, our Full Stack Software Engineers deliver impactful, end-to-end solutions that enable organisations to innovate, scale, and succeed in a digital-first world. As we grow our engineering capability across Scotland and Northern Ireland, you’ll help shape modern digital services, combining front-end creativity with back-end engineering excellence to deliver real business value. You’ll work in a collaborative environment that encourages ownership, supports continuous development, and empowers you to explore new ideas, ensuring the solutions you build make a lasting difference for 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 full stack applications that power critical client services. You’ll take ownership across the full development lifecycle, from shaping architecture and user experiences through to deployment and optimisation, combining modern front-end frameworks with robust back-end engineering to deliver high-quality outcomes.

You’ll collaborate with multidisciplinary teams and clients to turn ideas into impactful solutions, contributing creative thinking while ensuring alignment with business and user needs. You’ll be supported in continuously developing your skills while helping drive innovation and delivery excellence.

Key responsibilities:

• Design end-to-end full stack applications

• Build and integrate RESTful APIs and microservices

• Enhance responsive user interfaces using modern frameworks

• Develop cloud-native solutions across AWS, Azure, or GCP

• Ensure quality and security through testing and engineering best practices

• Collaborate with cross-functional teams and stakeholders

• Implement CI/CD pipelines and deployment workflows

• Improve application performance and reliability

Required qualifications to be successful in this role

You should bring strong full stack engineering experience, with the ability to work across both front-end and back-end technologies. You’ll have a solid understanding of modern development practices and be confident delivering secure, scalable solutions within Agile, collaborative environments.

Essential qualifications:

• Proven experience as a Full Stack Engineer

• Strong proficiency in TypeScript and Java or Python

• Experience with modern front-end frameworks (React, Angular, or Vue)

• Solid understanding of RESTful APIs and microservices architecture

• Experience with cloud platforms (AWS, Azure, or GCP)

• Familiarity with Docker and Kubernetes

• Experience working in Agile environments with 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 Full-Stack Developer

CGI