Als Senior Java Developer (m/w/d) gestaltest Du heute schon mit, was die Zukunft bringt! CompuGroup Medical is a leading company in the medical software industry committed to revolutionizing healthcare through cutting edge technological solutions. Our mission is to empower patients, physicians, and healthcare professionals worldwide with innovative software that enhances health and extends lives. Are you passionate about transforming legacy systems into modern, cloud native architectures? We are seeking a talented Software Developer to join our dynamic team, where you will play a crucial role in the ongoing development and refactoring of our existing software solutions. As a key contributor, you will have the opportunity to leverage your expertise in cutting edge technologies, driving innovation and efficiency in our processes. If you thrive in a collaborative environment and are eager to tackle the challenges of modernization, we invite you to help us shape the future of our software landscape. Join us on this exciting journey to enhance our applications and deliver exceptional value to our users! Key Responsibilities: * Design, develop, and maintain robust and scalable backend services using Java. * Participate in the modernization and migration of legacy systems to cloud native architectures. * Implement service based architecture with distributed services and RESTful APIs. * Utilize hexagonal (Ports and Adapters) / layered architectures to ensure maintainability and testability. * Implement messaging patterns, including request reply and publish subscribe, using message brokers like Artemis ActiveMQ (or alternatives Kafka, RabbitMQ). * Collaborate with cross functional teams to define, design, and ship new features and enhancements. * Optimize applications for maximum speed and scalability, including the use of caching systems such as Apache Ignite and Redis. * Conduct code reviews, provide feedback, and ensure adherence to best practices and coding standards. * Employ distributed transaction patterns as necessary to ensure data consistency across services. * Write and maintain Pact tests for contract testing and utilize Arch Unit for architecture validation. * Generate API documentation using SpringDoc OpenAPI and manage database migrations with Liquibase. * Document technical specifications and architectural designs for future reference. Qualifications: * 3+ years of experience in Java backend development. * Strong understanding of Java frameworks such as Spring Boot, Hibernate, and JPA. * Experience with microservices architecture and containerization technologies (Docker, Kubernetes). * Knowledge of database systems (SQL and NoSQL) and experience with data migration strategies. * Understanding of DevOps practices and tools (CI/CD, GitLab, etc.). * Experience with agile development methodologies (Scrum, Kanban). * Excellent problem solving skills and ability to work collaboratively in a team environment. Preferred Skills: * Familiarity wit