Senior Backend Developer; Kotlin​/Boot; Fully Remote

• Work on a custom FHIR server built with Kotlin and Spring Boot.
• Use PostgreSQL with advanced querying and JSONB data modeling.
• Integrate healthcare standards like FHIR R4 and OAuth authentication.

Responsibilities:

• Design and implement high-abstraction backend components for a dynamic query engine.
• Develop robust services and comprehensive automated test suites with JUnit.
• Collaborate on architecture and design decisions with a small engineering team.

Requirements:

• Strong experience in Kotlin and Spring Boot in production environments.
• Proven ability to build query engines, rule engines, or similar high-abstraction systems.
• Familiarity with HL7 FHIR, OAuth, or identity providers like Zitadel is a plus.
• Fully remote work within Europe with flexible collaboration.
• Competitive compensation aligned with senior-level expertise.
• Long-term engineering impact on a critical healthcare data platform.

Our partner is a healthtech company focused on rebuilding core healthcare data infrastructure with FHIR standards. They have a small engineering team with a deeply technical, engineering-driven culture emphasizing scalability and correctness.