Backend Engineer

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

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.

h4 margin: 1rem 0 1rem 0important; Schwarz Digits creates the technological foundation for digital sovereignty in Europe. As the IT and digital division of the Schwarz Group, we develop and manage the IT infrastructures for the retail divisions Lidl and Kaufland, as well as Schwarz Production and PreZero. At the same time, we operate as an independent provider in the external market to support companies across Europe in their digital transformation. We bundle our core services in the areas of Cloud, Cyber Security, Data & AI, Communication, and Workspace. Join us and contribute to digital sovereignty in Europe. With us, you will work at the intersection of agility and security: You will benefit from fast decision-making processes, enjoy genuine creative freedom in your projects, and be able to build upon the stable foundation of the Schwarz Group. Backend Engineer (m/f/d) Your tasks: You develop and extend HIVEconnect, our ETL broker that maps HL7 FHIR R4 resources into openEHR