Sr. FHIR Interoperability .NET Engineer

Overview

Remote
$80 - $90
Contract - W2
Contract - 12 Month(s)

Skills

Information Engineering
Cloud Architecture
Cloud Computing
Proxies
Data Processing
HL7
Health Care
Specification Gathering
Regulatory Compliance
Salesforce.com
Software Development
Workflow
Microsoft Azure
OAuth
RESTful
Routing
API
Amazon Lambda
Amazon Web Services
Authorization
C#
.NET
FHIR
Da Vinci
Gateway
Implementation Guides
Azure Health Data Services
Okta
RESTFUL API
JWT
Azure Functions
Serverless
CMS

Job Details

Job ID: S#5529 - Sr. FHIR Interoperability .NET Engineer

Remote but In-person final round interview required in either Hartford CT, Wellesley MA, Austin TX, or Milwaukee WI.

PLEASE NOTE: This is a 12 month contract to hire and needs to meet Client full-time conversion policies. Those dependent on a work permit sponsor now or anytime in the future (ie H1B, OPT, CPT, etc) do not meet Client requirements for this opening.

We are seeking a Senior Cloud Engineer to design and build the core backend services enabling our clients CMS Interoperability Phase 3 initiative.

This role focuses on developing a secure, scalable Proxy FHIR Service and complex serverless workflows that power data exchange across healthcare systems.

Key Responsibilities

  • Develop a C#/ .NET serverless Proxy FHIR Service serving as the secure gateway for all interoperability APIs.
  • Implement OAuth 2.0 / JWT–based security, Okta token validation, and internal token exchange.
  • Design intelligent routing and multi-stage workflows for Prior Authorization APIs (CRD, DTR, PAS).
  • Build resilient asynchronous jobs for payer-to-payer data exchange, claims data processing, and Salesforce data sync.
  • Ensure compliance with HL7 FHIR US Core standards and CMS interoperability requirements.
  • Collaborate with architects, analysts, and QA to translate technical specifications into production-ready cloud solutions.

Required Skills

  • 10+ years of backend software development in C#/ .NET.
  • Strong experience with Azure Functions and modern cloud architecture.
  • Prior experience with FHIR APIs, CMS interoperability, or healthcare data standards.
  • Deep understanding of RESTful API design, OAuth 2.0, and JWT security.
  • Ability to read and interpret detailed technical specifications.

Preferred Skills

  • Familiarity with Da Vinci Guides (CRD, DTR, PAS).
  • Experience integrating with Okta or similar identity providers.
  • Salesforce API experience, cloud API gateways, or healthcare cloud data tools (AWS HealthLake, Azure Health Data Services).
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