Senior Java Back End Developer

Senior Java Backend Engineer to join a long-term freelance project in Barcelona (hybrid: 3 days onsite, 2 remote). This role is part of a strategic transformation initiative in the financial sector, modernizing data management systems with cloud-native technologies and agile methodologies. Build and optimize back-end services with Java 8+/*, Spring Boot, and Microservices. Improve GUI functionality in collaboration with frontend teams. Work with Apache Kafka and Apache Spark for real-time data pipelines. Deploy and manage applications in OpenShift and Azure with Kubernetes and Docker. Collaborate in agile cross-functional teams (SCRUM, SAFe). Provide technical leadership and mentor junior developers. 7+ years of Java development (Java 8+, ideally *). Strong expertise in Spring Boot, Microservices, REST APIs. Experience with Kubernetes, Docker, CI/CD pipelines. Cloud knowledge (OpenShift, Azure). Familiarity with PostgreSQL, Hibernate, distributed systems. Proficiency in Kafka and Spark for real-time streaming. Awareness of Angular and testing frameworks (JUnit, Jasmine, Karma). Mid-Senior level Contract Software Development #