Application Developer (Java Full Stack) Job ID: JP054782

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.