Job Summary: Develop scalable and high-impact technological solutions for the healthcare sector, participating in backend projects leveraging Cloud Native architectures and microservices. Key Highlights: 1. Leading company in health and technology with 50 years of experience. 2. Innovative digital transformation projects. 3. End-to-end development with Java and Spring Boot. Java Backend Developer (Cloud \& Microservices) Would you be interested in further developing your career as a Java Developer at a **leading company in the health and technology sector**, with over **50 years of experience**, participating in innovative **digital transformation** projects? Oxigent Technologies is seeking a **Java Developer** to join a Barcelona-based software company specializing in medical-sector solutions, primarily for health mutuals. Your **mission** will be to contribute to the development of technological solutions applied to the healthcare sector, building scalable and high-impact systems that improve efficiency and patient care, working on **backend** projects from design through to production, within **Cloud Native** environments and modern architectures based on **microservices**. **What will be your main responsibilities?** * End\-to\-end development of solutions using **Java and Spring Boot**, in both **Cloud Native and On\-Premise** architectures * Design and implementation of **REST APIs** and reusable components * Active participation in designing **microservice architectures (Hexagonal, SOLID, IoC)** * Performance and data access optimization in **high-volume** systems * Resolution of incidents related to **performance and high availability** * Implementation of development best practices: **TDD, testing, CI/CD** * Evaluation and integration of **new technologies** to enhance architecture * Definition of **backend development guidelines** * Technical support and training for other developers * Application of **AI in the SDLC** and new methodologies such as **VibeCoding** **What do you need?** * Solid experience with **Java (8–17/21\) and language evolution** * Proficiency in **Spring Boot, Spring Cloud, Spring Security, and Spring Data** * Experience in developing **microservices and designing REST APIs** * Knowledge of **Hibernate / JPA / jOOQ** * Experience in **Cloud environments (AWS, Azure, or GCP)** and containers (**Docker, Kubernetes**) * Knowledge of **SQL and NoSQL databases** * Experience in **SQL performance optimization** * Familiarity with **testing (JUnit)** and quality tools (**Sonar**) * Proficiency with **Git (Git Flow)** and/or SVN **Desirable** * Experience with **Terraform, Ansible (IaC)** * Messaging systems (**Kafka, RabbitMQ**) * DevOps tools (**Jenkins, Nexus, SonarQube, Selenium**) * Experience with **Camunda BPM** * Knowledge of **security (OWASP / SDL)** * Experience in **AI applied to development** * Knowledge of frontend or complementary technologies (**Node**, **Angular**, etc.) **What do we offer?** * **Permanent contract** for a stable, long-term project * **Competitive salary: €45,000 – €50,000** * **Hybrid work model (3 days remote work)** * Location: **Barcelona (Plaza Lesseps)** * Continuous training (training voucher) * Private health insurance * Flexible compensation * Gym access with discount And many more benefits! Join the Oxigent team! A company committed to sustainability and equal opportunities, where talent and technology know no gender. Location: Spain \- Barcelona Date: 08/04/2026 Salary: €50,000 Employment Type: Employee