We are looking for an experienced Senior Java Developer to join a multidisciplinary Agile team responsible for the design, development, and maintenance of business-critical railway infrastructure systems. These applications are central to train traffic planning, infrastructure works, and operational safety, running in a 24/7 production environment.

You’ll work in a Agile way, collaborating with product owners, testers, and fellow developers to build robust, high-performing applications that directly impact mobility and infrastructure reliability across Belgium.

Key Responsibilities

• Technical Analysis: Translate business requirements into efficient and maintainable technical designs.
• Development: Build and enhance backend solutions using modern Java and the Spring ecosystem.
• Maintenance & Support: Ensure the stability and performance of complex, interdependent applications.
• Bug Fixing & Troubleshooting: Diagnose and resolve issues quickly and efficiently.
• Test Automation: Implement unit and integration tests (JUnit, Mockito) and integrate them into CI/CD pipelines.
• Documentation: Maintain clear, up-to-date technical and architectural documentation.
• Deployment: Contribute to release management and deployments in on-premise environments.
• Code Quality: Promote clean code practices, SOLID principles, and secure coding standards.
• Mentorship: Guide and coach junior developers, sharing best practices and technical insights.
• On-Call Support: Participate in a 24/7 rotation after a full training period (approximately one week per month).