Akens / Nordburg is seeking for a German IT-solutions company highly skilled and experienced Java Develper (m/f) to enlarge the Spanish based Team and contribute to the design and development of modern, reactive, and event-driven backend systems. You will work with a cloud-native technology stack, focusing on scalability, performance, and reliability, while collaborating closely with cross-functional teams.Location: 100% remote from SpainRESPONSIBILITIES:- Design, develop, and maintain backend services using Java and Spring Boot- Build reactive applications using Spring WebFlux- Implement and integrate event-driven architectures using Kafka- Develop real-time integrations via WebSocket and reactive messaging- Integrate databases using PostgreSQL, Hibernate, JDBC, and R2DBC- Implement Kafka integrations with Spring Cloud Stream- Contribute to containerized and cloud-native deployments- Ensure high code quality through clean code practices, testing, and reviews- Collaborate in CI/CD pipelines and infrastructure automation workflows- Work closely with product, architecture, and DevOps teamsREQUIREMENTS:- University degree in one of the following fields: science, mathematics, computer science, or engineering- Extensive experience with Spring Boot, including deep knowledge of frameworks and starters such as: Spring WebFlux (reactive programming), Reactive Kafka Streaming, WebSocket and Kafka Reactive Binder- Strong expertise in database integration, especially with PostgreSQL- Experience with ORM technologies (e.G. Hibernate)- Solid knowledge of JDBC and R2DBC for reactive data processing- Proven experience with event-driven architectures, including Kafka as a message broker- Hands-on experience integrating Kafka with Spring Boot (e.G. via Spring Cloud Stream)- Experience with containerized and cloud-native deployments- Knowledge of Kubernetes, CI/CD pipelines, and Terraform for infrastructure automation- Ability to work in a modern reactive technology stack and deliver clean, scalable, and reliable solutions- Strong attention to detail and commitment to high-quality software- Excellent communication and interpersonal skillsNICE-TO-HAVE REQUIREMENTS- Knowledge of time-series data processing- Experience with time-series databasesBENEFITS:- Opportunities to professional growth and development- Flexible work arrangements. 100% remote- Dynamic and collaborative work environment