We are seeking a Senior End-to-End Integration QA Engineer to support the CMS Burden Reduction / CMS Interoperability program. This role is heavily focused on API testing and validation of HL7 FHIR-based healthcare APIs, ensuring regulatory compliance, data integrity, and high-quality end-to-end integrations across complex healthcare systems. Required Skills & Experience: 8+ years of experience in End-to-End / Integration QA Strong hands-on API testing expertise (must-have) Extensive experience