Job Vacancy Senior Software Engineer

United Kingdom

CGI

Job position Senior Software Engineer

Permanent

As soon as possible

United Kingdom

Published on 04/02/2026

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At CGI, you’ll work at the heart of delivering modern digital solutions that help our clients solve complex challenges and achieve meaningful outcomes. As a Senior Software Engineer, you will design and build high-quality applications that combine robust backend services with intuitive user experiences. You’ll be trusted to take ownership of technical delivery, contribute ideas that shape solutions, and collaborate closely with talented colleagues across disciplines. Supported by a culture that values innovation, learning, and shared success, you’ll have the opportunity to grow your expertise while making a tangible impact on client services and products.

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.

Candidate profile

In this role, you will design, develop, and maintain scalable web applications using Java and React, contributing across the full software development lifecycle. You will work closely with product managers, designers, and fellow engineers to deliver features end-to-end, ensuring solutions are reliable, secure, and user-focused. You’ll take responsibility for code quality and performance, contribute to technical decision-making, and help evolve engineering standards and practices. Supported by experienced peers, you’ll have the freedom to solve problems creatively while delivering consistently high-quality outcomes.

Key responsibilities include:

• Design & develop backend services using Java and modern frameworks such as Spring Boot

• Build & enhance responsive frontend applications using React

• Develop & consume RESTful APIs to support scalable architectures

• Write & maintain clean, well-tested, and maintainable code

• Collaborate across multidisciplinary teams to deliver features end-to-end

• Review code, share knowledge, and contribute to engineering best practice

• Troubleshoot, optimise & improve application performance

• Support CI/CD pipelines and deployment activities

Required qualifications to be successful in this role

To succeed, you will bring strong hands-on experience in full-stack development, with a passion for building reliable software and improving how teams deliver. You will be comfortable taking ownership of your work, communicating clearly with stakeholders, and working collaboratively within agile delivery environments.

You should have:

• Strong experience with Java and frameworks such as Spring or Spring Boot

• Solid experience with React, JavaScript (ES6+), HTML, and CSS

• Experience designing and building RESTful APIs using JSON

• Familiarity with relational and/or NoSQL databases

• Experience using Git or other version control systems

• A problem-solving mindset with strong communication 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

CGI