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 Spain RESPONSIBILITIES: 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 teams REQUIREMENTS: 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 skills NICE-TO-HAVE REQUIREMENTS Knowledge of time-series data processing Experience with time-series databases BENEFITS: Opportunities to professional growth and development Flexible work arrangements. 100% remote Dynamic and collaborative work environment