Senior Java Developer (AWS, Microservices) – Sussex

Senior Java Developer (AWS, Microservices) - Travel - Sussex Daily rate: £550 - £700 (inside IR35) Duration: 3 - 6 months Hybrid: 1 - 2 days Start: ASAP My new client is looking for a Senior Java Developer (AWS, Microservices) to join the team on a contract basis. 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 other 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. This role demands a proactive, curious mindset, keeping them at the forefront of digital innovation. Qualifications: 5+ years of professional backend development experience. Strong understanding of Object-Oriented Programming principles and familiarity with Functional Programming Must be proficient in Java (v8 - v24) and DI frameworks Software design patterns. Knowledge of microservices architecture and event-driven patterns. Familiarity with other JVM languages Hands-on experience with AWS cloud services (Lambda, API Gateway, DynamoDB, ECS, S3, etc.). 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 testing, integration testing, and automation testing. Awareness of security best practices, OAuth2/JWT authentication. Awareness of SQL & NoSQL (Opensearch) Familiarity with travel industry concepts/GDSes *Rates depend on experience and client requirements