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# Backend Engineer

- **Company:** Schwarz Digits
- **Location:** Barcelona, Spain
- **Contract:** Permanent contract
- **Skills:** Query Performance, Java (Programming Language), Test Suite, Automation of Tests, Health Informatics, Clinical Data Repository, Code Review, Continuous Integration, Extract Transform Load (ETL), Relational Databases, Dependency Injection, DevOps, Github, Hibernate (Java), Interoperability, Java Persistence API, Junit, PostgreSQL, Mockito, Enterprise Application Integration, Data Logging, Fast Healthcare Interoperability Resources, Spring-boot, Backend, Git, Kubernetes, Health Level Seven International, Restful APIs, Docker
- **Published:** August 11, 2026
- **Apply:** https://es.trabajo.org/oferta-4112-0d35ab0a07877e999aeb079f57c721e5

## About the Role

mappings. You help evolve the system's data model: writing schema migrations, reviewing schema changes, and keeping PostgreSQL performance in check. Your profile: You have solid production experience with Java and Spring Boot dependency injection, security, REST APIs, async processing, and testing. You understand Enterprise Integration Patterns and are comfortable developing performant ETL processes (or have already used it); you think in terms of message pipelines, not just request/response. You have experience with relational databases (PostgreSQL preferred): schema design, JPA/Hibernate, migrations, and query performance. Ideally, you have experience with healthcare interoperability standards: HL7 FHIR R4, openEHR, or both. If not, you are eager to learn standards. You care about correctness above all, this is clinical data. You write tests as a matter of professional pride, not because a process requires it. Ideally, you have worked with container-based deployments (Docker,
Kubernetes, Helm) and understand what happens between git push and a running pod. You communicate clearly in English; German is a plus but not required. You are curious, self-directed, and energized by hard problems, you don't wait to be told what's broken.

## Description

Compositions using the openFHIR mapping engine and persists them in EHRbase. You design and implement new additional FHIR resource types (Observation, Procedure, Encounter, Medication, etc.) and its respective ETL. You contribute to the HIVEPRO Portal backend (Spring Boot REST API), implementing new endpoints for cohort management, query handling, and researcher project workflows. You write test automation (JUnit 5, Mockito, etc.) and contribute to improving quality and the CI/CD test suite (GitHub Actions). You participate in code reviews, architectural discussions, and help maintain clean abstractions across a multi-module Java codebase. You work with the DevOps team to containerize and deploy your services (Docker, Helm, Kubernetes) and ensure your services are observable: structured logging, metrics endpoints, and appropriate health probes. You engage with healthcare data standards (FHIR, openEHR) and collaborate with clinical informatics specialists to ensure correct semantic


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