Responsibilities Help build a custom FHIR server from the ground up Implement a dynamic query engine that operates on flexible parameters and FHIR structure definitions at runtime Work closely with a team of 3 internal developers, aligning on design decisions, task division, and progress Join to implement the remaining components, with a focus on the query engine Requirements Demonstrable experience building abstract backend implementations — query engines, rule engines, dynamic data processing systems, or comparable high‑abstraction work Strong ability to work at a high level of abstraction — the query engine operates on dynamic parameters and FHIR structure definitions, not a fixed set of operations Solid experience with Kotlin and/or JVM‑based backend development; Spring Boot experience strongly preferred Experience with PostgreSQL, including JSONB storage patterns and complex relational query design Ability to implement and maintain a comprehensive JUnit test suite alongside production code Strong communication and collaboration skills — you'll be working closely with the internal team on a shared task breakdown, not independently Comfortable aligning on design decisions, surfacing blockers, and adapting approach based on team feedback English B2 or above — required for daily collaboration with an international team Based in Europe (Portugal preferred), available to work fully remote #J-18808-Ljbffr
