We are seeking a Principal Interoperability Engineer with deep expertise in FHIR and Clinical Quality Language (CQL), combined with strong software engineering skills in .NET. The ideal candidate will design, implement, and optimize advanced healthcare interoperability solutions, translating complex clinical and quality measure logic into efficient, maintainable, high-performance code. This role requires both strategic technical leadership in interoperability standards and hands-on software engineering excellence. You will work closely with product managers, architects, and engineering teams to ensure compliance with healthcare regulations, data privacy requirements, and industry standards, including HL7, FHIR, C-CDA, and related APIs.