Senior Java Developer (AWS, Java, API) - Sussex - Hybrid

Senior Java Developer (AWS, Java, API) - Sussex - Hybrid

Daily rate: £500 - £700 (inside IR35)

Duration: 6 months

Hybrid: 2 days a week on site (tues, weds)

Start: ASAP

My client is looking for a Senior Software Developer (AWS/Java) to join the Digital Development & Delivery team. You will play a key role in designing, developing, and maintaining secure, scalable, and cloud-native Java microservices, primarily hosted on AWS, integrating with both internal and third-party systems.

Collaborating closely with technical leads, platform engineers, QA, and product teams, you will follow best practices in software design, observability, security, and DevOps principles. You will also contribute to L3 support activities, ensuring the stability and reliability of production systems.

Requirements:

• 5+ years of professional backend development experience
• Strong understanding of Object-Oriented Programming principles and familiarity with Functional Programming
• Proficiency in Java (v8 - v24) and dependency injection frameworks
• Knowledge of software design patterns
• Understanding of microservices architecture and event-driven patterns
• Familiarity with other JVM languages
• Hands-on experience with AWS cloud services (e.g., Lambda, API Gateway, DynamoDB, ECS, S3)
• Experience developing RESTful APIs
• Exposure to SOAP and GraphQL services
• Familiarity with CI/CD pipelines (e.g., Jenkins, GitHub Actions, AWS CodePipeline)
• Knowledge of unit, integration, and automation testing
• Awareness of security best practices, including OAuth2/JWT authentication
• Awareness of SQL and NoSQL (e.g., OpenSearch)
• Familiarity with industry-specific systems (e.g., GDS) is advantageous
• Partner and Vendor Teams (onshore and offshore)

Backend Service Development

• Design, build, and maintain secure, high-performance Java-based microservices
• Implement RESTful APIs and GraphQL integrations
• Ensure services are cloud-native, scalable, and resilient in AWS

Code Quality, Testing, and Best Practice

• Write clean, maintainable code following internal coding standards
• Develop automated tests (unit, integration, performance)
• Participate in peer code reviews and technical discussions

Operational Support and Continuous Improvement

• Support production systems through L3 incident triage and root cause analysis
• Monitor service health using observability tools
• Identify opportunities for refactoring and performance improvements

Collaboration and Agile Delivery

• Work with Technical Leads, QA Engineers, and Product Owners to deliver sprint goals
• Contribute to estimation, design discussions, and documentation
• Participate in DevOps practices including CI/CD and deployments

Security, Compliance, and Observability

• Develop secure APIs and backend services following best practices
• Embed monitoring, logging, and tracing into services
• Ensure solutions meet organisational security and compliance standards

*Rates depend on experience and client requirements