Senior Java Developer

Position Description At CGI, we help some of the world’s most recognised organisations solve complex challenges through innovative technology and expert delivery. As a Senior Java Developer, you’ll play a pivotal role in designing and delivering scalable software solutions that drive meaningful outcomes for our clients across multiple industries. Working within collaborative Agile teams, you’ll contribute technical expertise, influence solution design, and help shape high-quality digital services.

You’ll be empowered to take ownership of your work, bring fresh ideas to complex problems, and grow your career within a supportive environment that values innovation, continuous learning, and delivering lasting impact for clients and communities alike. 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 As a Senior Java Developer, you will play a key role in delivering robust, scalable, and high-performing software solutions for a diverse portfolio of clients. Working within multidisciplinary Agile teams, you will contribute throughout the full software development lifecycle, from solution design and development through to testing, deployment, and ongoing enhancement. You will collaborate closely with clients, architects, developers, and stakeholders to understand business challenges and translate requirements into effective technical solutions that deliver measurable value.

In this role, you will take ownership of technical delivery, champion engineering best practices, and support the growth of colleagues through mentoring and knowledge sharing. You’ll have the opportunity to influence solution direction, contribute innovative ideas, and help drive continuous improvement across projects while working within a supportive and collaborative consulting environment.

Key responsibilities: Design & Develop enterprise-grade applications using Java and Spring Boot

Collaborate & Deliver with clients and internal teams to translate business requirements into technical solutions

Lead & Mentor junior developers through coaching, technical guidance, and knowledge sharing

Build & Enhance RESTful APIs and scalable backend services

Contribute & Improve across all stages of the Agile software development lifecycle

Review & Maintain code quality through testing, peer reviews, and engineering best practices

Participate & Support sprint planning, stand-ups, retrospectives, and delivery activities

Communicate & Influence stakeholders through effective technical and client engagement

Optimise & Modernise applications using modern development approaches and tooling

Collaborate & Integrate with cross-functional teams to deliver high-quality client outcomes Required Qualifications To Be Successful In This Role To succeed in this role, you should have strong commercial experience developing enterprise applications using Java and Spring Boot, alongside a passion for delivering high-quality software within Agile environments. You will bring excellent communication and stakeholder management skills, a collaborative approach to problem-solving, and the ability to provide technical leadership and mentoring to colleagues.

Experience working in client-facing environments and exposure to cloud-native technologies would be highly advantageous.

Essential qualifications and experience: Significant commercial software development experience

Strong proficiency in Java (Java 8+) and Spring Boot

Proven experience developing RESTful APIs and backend services

Solid understanding of object-oriented design principles and software engineering best practices

Experience working within Agile delivery environments

Strong knowledge of Jira, Confluence, and Git

Proven ability to conduct code reviews and maintain high coding standards

Excellent communication, stakeholder engagement, and collaboration skills

Demonstrated experience mentoring or coaching developers within a team environment

Strong understanding of testing methodologies and version control practices Desirable experience: Experience within an IT consulting or client-facing environment

Knowledge of AWS, Azure, or Google Cloud Platform

Experience with Docker, Kubernetes, and containerised environments

Familiarity with CI/CD pipelines and DevOps practices

Exposure to microservices architecture and API integration patterns 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.