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.