Senior Java Developer (m/f)

Job description

ARHS Group, part of Accenture, is looking for a Senior Java Developer to join one of our client teams in Luxembourg within the banking sector . You will work on business-critical applications where software quality, performance, security, and reliability are key. Alongside hands-on Java development, you will contribute to the modernization of existing solutions, investigate complex technical issues, and help build a robust foundation for new projects. Please note that fluency in French is mandatory for this position. THE WORK: Develop and maintain robust backend solutions using Java 17+ and the Spring ecosystem . Contribute to application upgrades and technology modernization, addressing technical debt and obsolescence. Investigate complex technical issues using logs and monitoring tools, perform root cause analysis, and improve application resilience. Apply Security by Design principles, including authentication, authorization, secrets management, and data protection. Identify and address application vulnerabilities, including OWASP-related risks and dependency vulnerabilities. Improve application performance, code quality, error handling, and observability. Contribute to the modernization of existing services and the development of new solutions, ensuring smooth integration with web and mobile applications. Maintain technical documentation and automate testing to support reliable and stable production releases. 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: 5+ years of experience in Java development. Strong hands-on experience with Java 17+ , Spring Boot , and Spring Security . Strong analytical and troubleshooting skills, including experience investigating logs and monitoring data to identify root causes. Good knowledge of MS SQL . Experience with OpenShift and GitLab CI . Strong understanding of software testing, application security, and OWASP best practices. Experience with observability tools and technologies such as OpenTelemetry and/or the ELK Stack . Basic knowledge of Angular and an understanding of mobile environments such as iOS, Android, and Capacitor . Strong focus on code quality, performance, reliability, and maintainability. Fluency in French is mandatory. BONUS POINTS IF YOU HAVE: Experience working in the banking or financial services sector . Experience with application modernization or large-scale technical upgrade projects. Experience working with business-critical, high-availability applications. 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.