8 years of experience designing, developing, testing, and supporting healthcare interfaces using HL7 v2, FHIR, REST APIs, JSON, XML, data mapping, transformation, validation, troubleshooting, error handling, and healthcare data exchange. 5 years of experience developing secure web portals or portal-integrated services that retrieve and display healthcare data, including API integration, authentication, authorization, role-based access control, secure coding, testing, and production support.