Backend (Java or. Net) Developer

{ "@context": "http://schema.org", "@type": "JobPosting", "baseSalary" : { "@type": "MonetaryAmount", "currency": "EUR", "value": { "@type": "QuantitativeValue", "value": 0.00, "unitText": "MONTH" } }, "datePosted": "2026-05-13", "validThrough" : "2026-06-29", "description": " UST is looking for a Backend (Java or. Net) Developer! Proactive Hiring Process We are proactively sourcing and screening candidates for a Backend Engineer position expected to open in the near future. This is an excellent opportunity to get ahead in the process and be considered once the role is officially launched. Location: Madrid (hybrid: 3 days in the office, 2 days remote per week) CV Language Requirement: English RESPONSIBILITIES: Design, develop, and maintain backend services in a distributed, service-oriented architecture. Implement and consume RESTful APIs aligned with established architectural standards. Develop backend software using Java (Spring Boot) or . NET Core , depending on the product stack. Implement and maintain unit and integration tests as part of the development lifecycle. Collaborate closely with QA engineers, frontend developers, Dev Ops, architects, and product stakeholders. Participate actively in refinement, planning, development, and delivery activities. Ensure code quality, maintainability, and consistency across the backend codebase. Support applications running in production, including troubleshooting and analysis of logs, errors, and runtime behaviour. Contribute to continuous improvement of backend development practices, tooling, and technical solutions. YOUR PROFILE: Proven experience in backend software development within enterprise environments. Strong hands-on experience with Java and Spring Boot or . NET Core / ASP. NET Core . Solid experience designing and integrating RESTful APIs. Experience working with relational databases and SQL (Oracle, SQL Server, or equivalent). Familiarity with version control systems (Git). Experience with unit and integration testing. Understanding of Agile ways of working (Scrum / Kanban). Basic understanding of CI/CD concepts and Dev Ops environments. Awareness of production and operational aspects such as logging, error handling, and monitoring. Strong problem-solving skills and ownership mindset. Comfortable working in complex, regulated enterprise environments. Good communication skills and fluency in English. If you would like to know more, don't hesitate to apply and we'll get in touch to fill you in detail. We are waiting for you! In UST we are committed to equal opportunities in our selection processes and do not discriminate based on race, gender, disability, age, religion, sexual orientation or nationality. We have a special commitment to Disability & Inclusion, so we are interested in hiring people with disability certificate. ", "employmentType": "FULL_TIME", "industry": "Backend Developer", "jobLocation" : { "@type": "Place", "address": { "@type": "PostalAddress"