Location: Dublin or Manchester (Hybrid)Reports to: Engineering ManagerAbout the RoleWe are looking for a skilled and motivated Java Developer to contribute to the modernization of our backend architecture. You will support the transformation of SOAP-based services into RESTful microservices using Spring Boot, working in a cloud-native environment built on Docker, Kubernetes (or ECS), and AWS. Our platform consists of multiple distributed services which process millions of requests per hour. This is a great opportunity to deepen your experience in scalable systems and modern development practices while learning from senior engineers.Key ResponsibilitiesAssist in designing and implementing REST APIs using Spring Boot and SwaggerHubContribute to the transformation of SOAP/XML to REST/JSON for backend servicesSupport API development and integration in a microservices environmentContribute to containerized microservice development using Docker and Kubernetes, or AWS ECSParticipate in deploying and managing services on AWS cloud infrastructureCollaborate on integrating with API Gateway, Lambda, and IaC tools like CloudFormationTesting & QualityWrite and maintain integration and unit tests using tools such as JUnit and MockitoAssist with debugging API issues and ensuring accurate data transformationsWork with the team to implement CI/CD and automation practicesPerformance, Caching & DevOpsSupport performance tuning and caching solutions (e.g., Redis)Contribute to stateless microservice design and improvementsHelp monitor application health using tools like Prometheus or ELK StackWork closely with senior engineers, QA, and product teamsActively participate in agile ceremonies and sprint planningEngage in peer reviews, mentorship opportunities, and continuous learningRequired Skills & Experience3+ years in Java development with Spring BootUnderstanding of REST architecture principles and best practicesExperience building REST APIs and integrating with JSON-based servicesExposure to SOAP-to-REST migration or service transformation projectsHands-on with Docker and familiarity with Kubernetes or AWS ECSBasic knowledge of Infrastructure as Code (IaC) tools like Terraform or CloudFormationFamiliarity with relational and NoSQL databases: PostgreSQL, MySQL, MongoDB, or RedisExperience with CI/CD pipelines and tools such as Jenkins or GitLab CIProficiency in unit and integration testing (e.g., JUnit, Mockito)Understanding of authentication protocols like OAuth2 or JWTWorking knowledge of Java 8+Preferred SkillsExperience with API Gateways (e.g., AWS API Gateway)Familiarity with messaging systems like Kafka or RabbitMQBasic understanding of serverless technologies (e.g., AWS Lambda)Interest in evolving DevOps, automation, and cloud-native best practicesAbout DatalexDatalex's purpose is to transform airline retail. Datalex is a market leader in airline retail technology, offering unique products that enable airlines to drive revenue and profit as digital retailers. Datalex has a strong track record of delivering digital retail transformation for progressive airline brands worldwide, including Aer Lingus, easyJet, JetBlue Airways, Air China, Edelweiss, Air Transat, and Air Macau. The Group is headquartered in Dublin, Ireland, and maintains offices across Europe, the USA and China. In 2024, Datalex was awarded the 'Great Place to Work' and 'Best Workplaces in Tech' certifications. Datalex plc is a publicly listed company, on Euronext Growth, Dublin. Learn more at www.datalex.com or follow on LinkedIn @Datalex. #J-18808-Ljbffr