API Developer,.Net
.NET API Developer - CMS InteroperabilityLocation:Remote (U.S. Based)Duration:9 Months (with potential extension)Type:Contract (W-2 or C2C)Project Overview:Our client (confidential - healthcare payer) is seeking a highly specialized developer to support their CMS Interoperability Mandate project. This role will focus on building, securing, and supporting FHIR-based APIs for Patient Access, Prior Authorization, and Payer-to-Payer data exchange. The ideal candidate will have deep experience with Azure Health Data Services (AHDS), FHIR R4/HL7 implementation, and.NET 8 API development within a payer or healthcare data environment.Key Responsibilities:• Design and develop RESTful APIs in C#/.NET 8 that comply with FHIR R4 standards and CMS interoperability requirements• Deploy, manage, and optimize FHIR services using Azure Health Data Services (AHDS)• Configure Azure components including API Management (APIM), Functions, and Active Directory (AD) for secure API delivery• Implement SMART on FHIR protocols and OAuth2 authentication models• Collaborate across compliance, security, DevOps, and product teams to ensure standards alignment• Conduct API testing and documentation using tools such as Postman, Swagger, and OpenAPI• Support payer data integration and interoperability between health plans and external systemsMust-Have Skills:• 5+ years of professional experience with.NET (C#), including.NET 6 or 8• Hands-on experience building FHIR R4 APIs and working with HL7 v2/v3 data formats• Strong working knowledge of Azure Health Data Services and FHIR deployment in Azure• Expertise in Azure API Management, Azure Functions, and Azure AD• Experience implementing SMART on FHIR and OAuth2 authentication• Familiarity with healthcare payer data and claims integration• Excellent troubleshooting, API testing, and CI/CD (Azure DevOps) experienceNice to Have:• Experience with Azure DevOps pipelines for CI/CD automation• Familiarity with CMS compliance frameworks and regulatory reporting• Knowledge of payer systems (e.g., Facets, QNXT) or EHR integration Apply tot his job