Lead Java Developer

Role Title: Lead Java Developer

Location: Northampton, UK

Days on site: 2-3 per week

Job Type: Contract

Role Description:

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.

Key Responsibilities

• 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 optimize system efficiency

• Contribute to architectural decisions and roadmap planning

Required Skills & Experience

• 8+ years of experience in Java development with at least 2+ years in a lead role

• Strong expertise in:

o Core Java (Java 8+)

o Spring Framework & Spring Boot

o REST API development

• Hands-on experience with:

o Apache Kafka

o MongoDB or other NoSQL databases

o Docker and containerization

o Helm / Kubernetes deployments

• Solid understanding of CIAM / IAM concepts, including:

o OAuth2, OpenID Connect (OIDC), SAML

o Identity lifecycle management

o Authentication & authorization frameworks

• Experience designing scalable, distributed systems

• Strong knowledge of microservices architecture

• Familiarity with DevOps practices and CI/CD pipelines