Job Vacancy Java Developer (Security Clearance)

Leatherhead

CGI

Job position Java Developer (Security Clearance)

Permanent

As soon as possible

Leatherhead, England, United Kingdom

Published on 15/01/2026

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At CGI, we deliver secure, mission-critical systems that protect national interests and enable smarter decision-making across space, defence and intelligence. In this role, you will help shape high-impact solutions by building resilient Java services that transform complex data into meaningful insight for end users. Working within a collaborative, agile environment, you’ll have real ownership of outcomes, the freedom to innovate, and the support to grow your expertise while contributing to programmes that truly matter.

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 role is five days a week working in the Leatherhead Office.

Candidate profile

In this role, you will design, build and test secure Java-based web services that interrogate and manipulate multiple data sources, delivering correlated information to front-end applications. You will work within a SAFe Agile framework, contributing to iterative delivery across structured sprints, taking ownership of your work while collaborating closely with other developers, testers and stakeholders in a fast-moving environment.

You will be encouraged to think creatively, adapt to changing requirements, and continuously improve solution quality. With strong team support around you, you’ll help ensure reliable delivery across development and, where required, production support activities.

Key responsibilities include:

Design & Develop secure Java services and RESTful APIs

Test & Assure through automated unit and integration testing

Collaborate & Deliver within a SAFe Agile delivery model

Adapt & Improve solutions in response to evolving requirements

Support & Maintain systems across the delivery lifecycle

Required qualifications to be successful in this role

You should be an experienced Java developer with a strong background in building and testing RESTful services, comfortable working in secure, delivery-focused environments. You will bring a pragmatic mindset, excellent communication skills, and the ability to adapt quickly while maintaining high engineering standards.

Essential qualifications:

Strong experience developing and automated testing of Java services

Recent hands-on experience building RESTful APIs

Excellent teamwork and communication skills

Sole UK nationality with active SC Clearance (no unrestricted travel permits)

Willingness to work full-time from CGI’s Leatherhead office (5 days per week)

Desirable experience:

Front-end development exposure (e.g. React with Jest)

JUnit and integration testing tools such as ReadyAPI

Git for source-code management

REST APIs using OpenAPI and JSON

SQL and PL/SQL scripting against Oracle databases

CI/CD tooling such as GitLab Runner or Jenkins

Nice to have:

Selenium for front-end integration testing

Understanding of SOAP services and Oracle SOA

Experience supporting production environments and release activities

#LI-SB2

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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Java Developer (Security Clearance)

CGI