We are looking for a Senior Java Developer with strong expertise in Java and Spring Boot to design, develop, and maintain high-quality enterprise applications in a complex and regulated environment.This role involves close collaboration with business stakeholders, solution teams, and other IT departments, playing a key role in delivering robust, scalable, and secure software solutions, while also contributing to technical leadership and mentoring.Key ResponsibilitiesDesign and develop Java applications based on business and functional requirementsBuild and maintain RESTful APIs using Spring BootEnsure application architecture, performance, scalability, and securityCollaborate closely with business and technical teams to propose effective solutionsAnalyze and resolve complex technical issuesParticipate in data integration and migration activitiesWork with cross-functional teams (solutions, IT, production, external partners)Ensure code quality through testing, code reviews, and best practicesContribute to CI/CD pipelines and application monitoringMentor junior developers and contribute to technical leadership initiativesRequired Skills & ExperienceTechnical Skills5–7+ years of experience in Java (version 8 or higher)Strong expertise with Spring Boot, including:Spring Data JPA / HibernateSpring SecuritySpring BatchSolid understanding of REST API design and developmentExperience with JWT-based authentication and authorizationFamiliarity with microservices architecture and design patternsExperience with API documentation and testing tools (Swagger, Postman)Knowledge of API monitoring, publishing, and managementExperience with SQL Server and DB2 databasesFamiliarity with Tomcat application serverProficiency with Maven for build and dependency managementExperience with Git / GitLabKnowledge of CI/CD tools (Jenkins v2+)Practical experience with DockerExperience with Splunk (v8+) for logging and monitoringExperience with Sonar for code quality analysisProficiency with JUnit for unit testingBasic to intermediate Unix / Bash scriptingKnowledge of WSO2 API Manager is a plusExperience with XLD is a plusHybrid Work: 2/3x On-Site in Lisbon