Java Back-end Developer

Description

Job Summary: We are seeking a Java Back-end Developer to join a multidisciplinary team and contribute to the digitalization of medical management processes. Key Highlights: 1. Positive impact on the world through technology 2. Working in a multidisciplinary and collaborative team 3. Personalized career path and continuous learning Barcelona* Posted on 3/3/2026 #### **Humanizing Technology.** We are a large company with a start-up soul. We organize ourselves into expert knowledge units that collaborate with each other. Therefore, we seek **inquisitive individuals**, who are **motivated by challenges and eager to grow both personally and professionally**, and who wish to join our team to make a **positive impact** on the world through technology. **ARE YOU READY TO TAKE ON 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 specialists 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 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—such as back-end (Java, .Net, NodeJS, etc.), mobile development (iOS, Ionic, Flutter, etc.), or web development (HTML+JS+CSS, AngularJS, etc.)—will also be positively valued. **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 software quality, reliability, and security. * Manage versioning, dependencies, and deployments using **Git** and **Maven**. * Collaborate with other team members in a highly coordinated work environment. * Perform integrations with legacy systems using **SOAP** and **JNLP** (where applicable). **WHAT DO WE EXPECT FROM YOU?** ------------------------- * Proficiency in Java 21. * Advanced understanding 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 anticipatory capacity. * Strong communication skills with both technical and functional stakeholders. * Ability to work effectively within a multidisciplinary team. #### **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 one another. * **Flexibility and work-life balance**. Remote work is in our DNA. We promote flexible working hours and offer a shortened workweek on Fridays and during July and August. * **Continuous learning**. Training in languages, technical skills, certifications, etc. * **Personalized career development**, empowering you to decide how far you want to go. * **Autonomy**, along with opportunities to propose and drive new initiatives. * **Flexible compensation program**: daycare, meal, transportation vouchers, and private health insurance. * **Exclusive discounts and special conditions** for technology, entertainment, travel, etc. * You can participate in **social and environmental initiatives**. * If you have international aspirations, **we operate in 45 countries**. **Join our team and help us humanize the world through technology!**