Job Summary: We are looking for a Backend Developer with Java and Spring experience for a project in the Defense Sector, focusing on REST APIs and agile methodologies. Key Highlights: 1. Java development and Spring ecosystem experience 2. Experience in REST API design and optimization 3. Knowledge of agile methodologies Java\-Spring Backend Developer At Arelance, we know that people are the most important asset within a company; therefore, we invest significant effort in finding the best professionals for our clients and offering our candidates the best projects. Currently, we are seeking a Backend Developer with at least 2 years of professional Java experience to join an important development project for the Defense Sector in León. What are we looking for in you? * Java development and Spring ecosystem experience. * Experience in REST API design, maintenance, and optimization. * Advanced English. * PostgreSQL databases. * Unit testing experience. * Knowledge of agile methodologies. * Quarkus and Docker development knowledge is desirable. What do we offer in this position? * Permanent contract with Arelance * Access to training in León (60 remote). * Compensation: based on experience and profile provided. If you are interested in a great opportunity like this, apply now! We want to meet you! Only candidates with work and residence permits in Spain will be considered java, spring, quarkus, postgresql, rest, backend