Healthcare Interoperability Engineer -- 100% Remote -- C2C/W2 Profiles Only

Job Title: Senior Healthcare Interoperability Engineer

Location: Remote


it is long term contract (1 year and extend)


Key Responsibilities

• Design and build FHIR R4–compliant APIs using .NET 8+

• Implement CMS-mandated APIs:

• Patient Access API

• Provider Access API

• Payer-to-Payer Data Exchange

• Prior Authorization API

• Provider Directory API

• Integrate and configure Smile CDR for CMS compliance

• Implement Da Vinci FHIR IGs (PAS, PDex, CDex, HRex, CRD, DTR)

• Develop HL7 v2/v3 and X12 (278, 837, 835) processing and transformations

• Build Prior Authorization workflows, including CRD and DTR

• Architect and develop a custom FHIR server (resource persistence, search, validation)

• Ensure HIPAA compliance, auditing, and security

• Integrate with EHRs, claims systems, PBMs, and external FHIR endpoints

• Optimize performance for high-volume healthcare data

Required Skills (Must Have)

• 7+ years of C#/.NET development (preferably .NET 8+)

• Deep expertise in FHIR R4 (resources, profiles, extensions, IGs)

• Strong knowledge of HL7 v2.x / v3

• CMS Interoperability & Prior Authorization Final Rule experience

• Da Vinci FHIR IGs: PAS, PDex, CDex, HRex, CRD, DTR

• Experience building FHIR APIs from scratch

• SQL Server (complex queries, performance tuning)

• Clinical terminologies: LOINC, SNOMED CT, RxNorm, ICD-10, CPT, HCPCS

• Azure experience (App Service, API Management, Service Bus, Key Vault)

Nice to Have

• Hands-on Smile CDR configuration and customization

• Experience with HAPI FHIR, Firely Server, Azure API for FHIR

• SMART on FHIR, OAuth 2.0, OIDC, UDAP

• FHIR Bulk Data ($export), Subscriptions

• X12 EDI processing (278, 837, 835, 270/271)

• Firely .NET SDK, NHapi

• React + TypeScript (provider/member portals)