Join Stefanini! At Stefanini, we are more than 30,000 geniuses, connected from 41 countries, doing what we are passionate about and co-creating a better future. **Responsibilities and Attributes** * Modernize existing Java microservices and migrate them to **Java 21** according to client guidelines. * Update dependencies and project structure (**Gradle/Maven**). * Adjust configuration files (application.yml, health/check endpoints, CORS, properties). * Adapt the service for containerized execution and environment-based variable reading. * Debug inherited CDP/PCF configurations (manifest, ACCP, obsolete properties). * Resolve code-level findings from **SonarQube, Fortify, BlackDuck, and WebInspect**. * Provide technical support during functional troubleshooting throughout the migration. * Document changes, technical decisions, and migration guidelines. **Requirements and Qualifications** You definitely don't want to miss this! **Requirements** -------------- * +5 years of backend development experience with **Java / Spring Boot**. * Experience upgrading Java versions (ideally experience with **Java 17/18 Java 21**). * Solid knowledge of **REST APIs**, microservices, and 12-factor best practices. * Experience with **Gradle or Maven**. * Desirable experience in: * Database integration (DB2, Oracle) * Redis (application level) * OAuth2 / Client Credentials Flow We are looking for a Java Backend Developer who is eager to learn and take on new challenges. The candidate must have the following skills: * Proactive * Self-taught. * Teamwork skills. Are you looking for a place where your ideas can shine? With over 38 years of experience and a global presence, at Stefanini we transform tomorrow together. Here, every action counts and every idea can make a difference. Join a team that values innovation, respect, and commitment. If you are a disruptive person, committed to continuous learning, and innovation is in your DNA, then this is exactly what you're looking for. Come and let's build a better future together!