.NET Middleware Developer

Key Responsibilities

A. Middleware Development & Integration

* Design and develop scalable middleware applications using C# .NET 8 and Core.

* Develop RESTful APIs and integration services connecting multiple healthcare applications.

* Build orchestration services coordinating transactions across payer systems UM platforms and interoperability APIs.

* Implement synchronous and asynchronous communication mechanisms.

* Develop configurable transformation services supporting JSON XML CSV and flat-file formats.

* Build file-based integration services supporting SFTP transfers file validation acknowledgments and exception handling.

* Implement transaction tracking retry mechanisms error handling and reconciliation processes.

* Develop reusable integration components supporting multiple Medicaid state implementations.

.

3. Required Technical Skills

Technology / Skill Requirement

• C# Expert
• .NET 8 / Core Expert
• REST API development Expert
• Microservices architecture Strong
• JSON / XML / CSV processing Strong
• SFTP and flat-file integrations Strong
• API orchestration Strong
• SQL Server / relational databases Strong
• OAuth 2.0 / JWT Strong
• Git / Azure DevOps Strong
• CI/CD pipelines Strong
• Docker / containerization Preferred
• HL7 FHIR R4 Preferred
• Healthcare EDI / X12 Preferred
• Azure / AWS Preferred
• Distributed messaging / queues Preferred

4. Healthcare Domain Knowledge

Highly desirable:

* US Medicaid and Medicaid Management Information Systems (MMIS)

* Healthcare payer operations

* Prior authorization workflows

* Utilization management systems

* CMS Interoperability and Prior Authorization Final Rule (CMS-0057-F)

* HL7 FHIR R4

* Da Vinci CRD DTR and PAS implementation guides

* Provider-to-payer integration workflows

* Healthcare API and legacy application interoperability

Experience working with multiple healthcare vendors and integrating legacy payer systems with modern FHIR APIs will be a significant advantage.

An ideal candidate will have:

* 10 years of professional software development experience.

* 9 years of / C# development.

* 5 years of API and enterprise integration development.

* Experience integrating legacy applications with modern REST APIs.

* Strong understanding of distributed systems and integration patterns.

* Prior experience in US healthcare payer or Medicaid environments.

* Ability to independently own middleware components from design through deployment.