About Us The Swiss Personalized Health Network (SPHN) is a national network mandated by the State Secretariat for Education, Research and Innovation (SERI) to enable the secure reuse of health data for research and innovation. Its mission is to ensure that clinical information collected across Swiss hospitals can be made FAIR (Findable, Accessible, Interoperable, and Reusable) and comparable across institutions.  SPHN fosters interoperability at two complementary levels: Semantic interoperability through common data models, ontologies, and terminologies, enabling health data to be linked, queried, and understood consistently across institutions. Computational interoperability through BioMedIT, a secure federated IT infrastructure connecting Swiss hospitals and research institutions, providing trusted environments for privacy-preserving data transfer, storage, and analysis.  To strengthen its semantic layer, SPHN is seeking a Senior Software Developer with strong expertise in Semantic Web technologies, particularly SPARQL, and a solid understanding of data pipeline infrastructures and architectures. The successful candidate will contribute to the design and implementation of solutions that put semantic interoperability into practice across the Swiss health data ecosystem.Responsibility/TaskContribute to the design and implementation of ontologies, data models, and APIs supporting semantic interoperability of health data. Develop and maintain semantic data services, with a focus on SPARQL query optimization and integration with RDF triple stores (e.g., GraphDB, Virtuoso).Build tools and workflows that support the alignment of health datasets with international medical informatics standards (FHIR, SNOMED CT, LOINC, HealthDCAT). Collaborate with clinicians, researchers, and IT specialists to translate semantic interoperability requirements into robust technical solutions. Lead the development and on-premises implementation of ETLs and software such as the SPHN Connector and Einstein, enabling secure and standardized data exploration across Switzerland.