### **Application Developer (Java Full Stack)** We are looking for an experienced **Application Developer** to support the takeover, maintenance, modernization, and development of a portfolio of business-critical applications within a large enterprise environment. You will work on both maintaining existing systems and re-engineering applications to align with modern development standards. #### **Key Responsibilities** - Develop, maintain, and enhance business applications and web services. - Participate in the takeover and knowledge transfer of existing applications. - Re-engineer and modernize legacy applications using current technologies and best practices. - Design and develop application components in collaboration with technical leads and software architects. - Build RESTful APIs and full-stack web applications. - Participate in Agile/Scrum ceremonies, technical workshops, and user meetings. - Perform unit testing, technical documentation, deployment, and reporting using Jira and related tools. - Troubleshoot, maintain, and improve existing codebases in complex multi-system environments. #### **Required Skills & Experience** - Minimum **7 years of professional Java development experience** (full-stack preferred). - Strong experience with: - Java 17+ - Spring Framework 4+ - Spring Boot 3+ - Angular 19+ - RESTful APIs & OpenAPI - Maven - Docker - Git - NPM - PostgreSQL, SQL Server, and relational databases - JUnit, Mockito, Cypress (Test-Driven Development) - BPMN and UML - Experience working with Agile/Scrum methodologies and CI/CD practices. - Strong analytical and problem-solving skills with the ability to understand and maintain existing applications. #### **Nice to Have** - Keycloak - Hibernate - Lombok - MapStruct - OpenShift / Kubernetes - GitLab CI - SonarQube - OAuth 2.0 - Flyway or Liquibase - Jira & Confluence #### **Languages** - Fluent **Dutch or French** (one is required). - Advanced written English. #### **Work Arrangement** - Hybrid role with a minimum of **2 days onsite per week** in **Brussels**. - Initial contract until **30 September 2026**, with strong possibility of extension. - **EU nationals only.**