Senior Java Backend Engineer (m/f)

ARHS Group, part of Accenture, is looking for a Senior Java Backend Engineer to join one of our client teams in Luxembourg within a European institutional environment . In this role, you will contribute to the development and maintenance of Java-based applications and web portals using Spring Boot . You will work closely with technical and functional teams to deliver reliable backend solutions deployed across on-premises and cloud environments. THE WORK: Develop, maintain, test, and deploy Java and Spring Boot applications, web portals, components, and libraries. Design and implement backend services and integrations using REST and SOAP web services. Collaborate with team leads, technical leads, business analysts, developers, and testers to understand requirements and ensure consistency across solutions. Contribute to automated testing and continuous integration and deployment processes. Deploy and monitor applications in on-premises and cloud-based containerized environments . Onsite at client site: This role requires an onsite presence with our clients and partners to support project delivery and strengthen collaboration. Our roles require in-person time to encourage collaboration, learning, and relationship-building with clients, colleagues, and communities. As an employer, we will be as flexible as possible to support your specific work/life needs. HERE’S WHAT YOU’LL NEED: Strong experience in Java 17 , preferably Java 21 or higher. Solid knowledge of Spring Framework 6.x and Spring Boot 3.x , or higher versions. Experience with JPA / Hibernate . Knowledge of REST and SOAP web services and asynchronous communication using Kafka . Experience with unit testing frameworks such as JUnit or TestNG , and mocking frameworks such as Mockito . Experience with Maven, Git, CI/CD pipelines (preferably Azure DevOps), and Docker . Familiarity with cloud environments, preferably Microsoft Azure . Knowledge of authentication and authorization using OIDC / OAuth . Ability to collaborate effectively with technical and functional teams. BONUS POINTS IF YOU HAVE: Experience in full-stack web development using a JavaScript framework, preferably React . As part of our security and compliance procedures, candidates will be required to undergo a criminal background check prior to employment. Arηs Group, Part of Accenture, specializes in the management of complex public sector IT projects, including systems integration, informatics and analytics, solution implementation and program management. Our team helps lead clients through digital and information systems design, bringing expertise in a variety of areas ranging from software development, data science and security management to machine learning, cloud, and mobile development. Arηs Group was acquired by Accenture in July 2024.