£500 p/d inside IR35 | 6 months initial

Hybrid – 1 dpw in London | SC Cleared (preferred)

A major public sector technology programme is seeking an experienced Senior Java Developer to support the design, development and delivery of secure, scalable, enterprise-grade services.

This is a senior engineering role, suited to someone with strong Java/Spring experience who can take ownership of complex backend development, contribute to technical design, mentor other developers and help maintain high engineering standards across a large-scale delivery environment. The role will focus on building robust microservices, RESTful APIs and cloud-ready applications within a modern DevOps environment.

Key Responsibilities:

• Lead the design, development and deployment of Java applications and microservices
• Build secure, scalable RESTful APIs and integrate with internal and external systems
• Define and maintain coding standards, design principles and engineering best practice
• Support cloud deployment using containerisation and CI/CD pipelines
• Work closely with Product, DevOps, QA and architecture teams to align technical delivery
• Identify and address technical debt, performance issues and operational risks
• Act as a technical escalation point for complex issues or critical incidents
• Mentor developers and support a culture of technical excellence

Essential Skills:

• Strong commercial experience developing enterprise-grade Java applications
• Deep knowledge of modern Java, ideally Java 11+
• Strong Spring ecosystem experience, including Spring Boot, Spring MVC and Spring Data
• Good understanding of microservices architecture and RESTful API design
• Experience with relational and/or NoSQL databases, including data modelling and query optimisation
• Hands-on experience with Docker, Kubernetes or similar container technologies
• Experience working with CI/CD pipelines and version control tools such as GitLab, Jenkins or GitHub Actions
• Strong automated testing experience, including JUnit and Mockito
• Excellent problem-solving, communication and stakeholder engagement skills
• Active SC clearance, or eligibility and willingness to undergo

Desirable:

• AWS or equivalent cloud platform experience
• Terraform or Infrastructure as Code exposure
• Kafka, RabbitMQ or other event-driven/messaging technologies
• Monitoring and logging tools such as Prometheus, Grafana or ELK
• Experience working in public sector, regulated or secure delivery environments
• Agile delivery experience using tools such as Jira or Confluence