Lead Java Developer (CIAM and Kafka)

We are seeking an experienced Lead Java Developer with CIAM Customer Identity and Access Management expertise to design, develop and lead the implementation of scalable and secure identity solutions. The ideal candidate will have strong technical leadership capabilities and deep proficiency in modern Java‑based technologies along with IAM concepts.

The places that you work from day to day will vary according to your role, your needs, and those of the business; it will be a blend of company offices, client sites, and your home; noting that you will be unable to work at home 100% of the time.

Your Role

• Lead the design, development and deployment of robust backend services using Core Java, Spring and Spring Boot.
• Architect and implement CIAM solutions ensuring scalability, reliability and security.
• Build and maintain RESTful APIs for integration with internal and external systems.
• Work with Kafka for event‑driven and streaming architectures.
• Design and manage data persistence using MongoDB.
• Develop containerized applications using Docker and manage deployments via Helm/Kubernetes.
• Collaborate with cross‑functional teams including security, DevOps and product teams.
• Provide technical leadership, mentorship and code reviews for development teams.
• Ensure adherence to security best practices, especially around authentication, authorization and identity management.
• Troubleshoot performance issues and optimise system efficiency.
• Contribute to architectural decisions and roadmap planning.

Your Skills

• 8 years of experience in Java development with at least 2 years in a lead role.
• Strong expertise in Core Java (Java 8).
• Experience with Spring Framework and Spring Boot.
• Hands‑on experience with Apache Kafka.
• Experience with MongoDB or other NoSQL databases.
• Experience with Docker and containerisation.
• Solid understanding of CIAM/IAM concepts, including OAuth2, OpenID Connect, SAML and identity lifecycle management.
• Strong knowledge of microservices architecture.
• Familiarity with DevOps practices and CI/CD pipelines.
• Experience with CIAM platforms such as Azure AD B2C, Okta, Auth0, ForgeRock or similar.
• Knowledge of API gateways and security frameworks.
• Exposure to cloud platforms Azure, AWS or GCP.
• Experience in high‑availability and high‑performance systems.
• Certifications in Java, Cloud or IAM are a plus.

We are a Disability Confident Employer

• Capgemini is proud to be a Disability Confident Employer (Level 2) under the UK Government’s Disability Confident scheme.
• As part of our commitment to inclusive recruitment, we will offer an interview to all candidates who declare they have a disability and meet the minimum essential criteria for the role.
• Please opt in during the application process.

Benefits

• Capgemini is recognized as a Great Place to work for wellbeing; employee wellbeing is vitally important to us.
• We have trained Mental Health Champions across business areas and have invested in wellbeing apps such as Thrive and Peppy.
• Employees benefit from Capgemini’s “learning for life” mindset, with countless training and development opportunities and access to 250,000 courses with external certifications.

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