Job Summary: Join a multidisciplinary team as a Java Back-end Developer, focusing on digitalizing and modernizing medical management processes with cutting-edge technology. Key Highlights: 1. Formar parte de un equipo multidisciplinar que digitaliza procesos médicos. 2. Trabajar con Java 21 y el ecosistema Spring en arquitecturas de microservicios. 3. Promoción de la flexibilidad, conciliación y aprendizaje continuo. Java Back\-end Developer Humanizing Technology. We are a large company with a startup soul. We organize ourselves into expert knowledge units that collaborate with each other. Therefore, we seek curious individuals motivated by challenges and eager to grow both personally and professionally, who will join our team to make a positive impact on the world through technology. ARE YOU UP FOR THE CHALLENGE? As a Java Back\-end Developer, you will join a multidisciplinary team of approximately 20 people, working alongside developers, QAs, technical leads, architects, and UX/UI designers in a collaborative environment focused on the digitalization and modernization of medical management processes. The selected candidate will become part of a We are leaders in end-to-end application maintenance, based on operational improvement. This includes recurring maintenance and technical and functional support services, as well as evolutionary enhancements and new developments. We cover all necessary layers—from conceptualization and design through to quality assurance and security of applications to be deployed. We advocate for multidisciplinary profiles and embrace the Full Stack philosophy; therefore, experience in other technology stacks—whether back-end (Java, .Net, NodeJS, etc.), mobile development (iOS, Ionic, Flutter, etc.), or web (HTML\+JS\+CSS, AngularJS, etc.)—will also be positively considered. WHAT WILL YOU DO DAILY? * Design, develop, and maintain back-end services using Java 21 and the Spring ecosystem. * Participate in defining layered and microservice-based architectures. * Implement complex business logic and integrate heterogeneous services from the healthcare ecosystem. * Design and consume REST APIs following best practices (HTTP, REST, OpenAPI). * Ensure the quality, reliability, and security of developed software. * Manage versioning, dependencies, and deployments using Git and Maven. * Collaborate with other team members in a highly coordinated working environment. * Perform integrations with legacy systems via SOAP and JNLP (where applicable). WHAT DO WE EXPECT FROM YOU? * Proficiency in Java 21\. * Advanced knowledge of OOP and SOLID principles. * Experience with layered architecture. * Experience with microservices. * Spring Framework: * Spring Boot * Spring Web * Spring WebFlux * Spring Security * Spring Data MongoDB * Experience with Spring Boot Starters (understanding and implementation) * Knowledge of Lombok. * Experience with MongoDB (queries and aggregations). * Knowledge and application of OAuth2\. * Experience designing and consuming HTTP/REST/OpenAPI APIs. * Maven and Git. * Valuable qualifications: * Containerization with Docker / Docker Compose. * AWS experience (Lambda, S3, SQS, ElastiCache, AWS SDK, Parameter Store). * Use of MapStruct. * Knowledge of Jenkins. * Knowledge of HATEOAS. * Experience integrating SOAP or JNLP systems. * High proactivity, initiative, and foresight. * Strong communication skills with both technical and functional stakeholders. * Ability to work collaboratively within a multidisciplinary environment. WHAT WILL YOU FIND AT SEIDOR? * A diverse team. We respect differences that make us more human. * Camaraderie. We work as a team and learn from each other. * Flexibility and work-life balance. Remote work is in our DNA. We promote flexible working hours and offer shortened workdays on Fridays and during July and August. * Continuous learning. Training in languages, technical topics, certifications, etc. * Individualized career paths, enabling you to decide how far you want to go. * Autonomy and the opportunity to propose and drive new initiatives. * Flexible compensation program: nursery, meal, transport vouchers, and private health insurance. * Exclusive discounts and special conditions on technology, leisure, travel, etc. * Opportunities to participate in social responsibility and environmental initiatives. * If you have international aspirations, we operate in 45 countries. Join our team and help us humanize the world through technology! Java, Spring, WebFlux, MongoDB,