Senior Java Developer

About the role

We are seeking a Senior Java Developer with deep HL7® FHIR® expertise to lead the design and implementation of payer-centric interoperability platforms. This role focuses on building secure, scalable FHIR R4 services (with R5 experience as a plus) that expose member, coverage, claims, and clinical data across required FHIR resources and operations. The ideal candidate will work in a cloud-native Microsoft Azure environment, leveraging Kafka-based event streaming and MongoDB to support high-volume, regulatory-driven healthcare data exchange.

Responsibilities

• Design, implement, and maintain FHIR R4 servers and APIs supporting payer-relevant resources and operations (CRUD, search, history, bulk data, subscriptions).
• Define and manage FHIR profiles, extensions, value sets, and terminology bindings aligned with payer use cases.
• Map and transform payer system data (membership, claims, benefits, authorizations) into FHIR-compliant formats.
• Build Java 17 or more/ Spring Boot microservices using clean architecture and domain-driven design principles.
• Develop and integrate RESTful and event-driven APIs using Kafka.
• Implement HAPI FHIR frameworks for persistence, validation, and serialization.
• Apply SMART on FHIR, OAuth 2.0, and OpenID Connect for secure authentication and authorization.
• Ensure HIPAA-compliant handling of PHI, including encryption, audit logging, and access controls.
• Deploy and scale applications in Microsoft Azure using Docker and Kubernetes (AKS).
• Design resilient systems with retries, circuit breakers, idempotency, and DLQs.
• Contribute to CI/CD pipelines and infrastructure-as-code initiatives.
• Establish testing strategies (unit, integration, performance) and observability practices.
• Mentor engineers, conduct code reviews, and contribute to architecture decisions.

Requirements

• 5 years of professional Java development experience.
• Strong expertise in Java 11 (preferably Java 17) and Spring Boot.
• 3 years of hands-on FHIR experience (R4 required; R5 preferred).
• Experience with core FHIR resources, profiles, extensions, validation, and versioning.
• Proven experience with HAPI FHIR (server configuration and customization).
• Solid understanding of payer healthcare data domains (member, coverage, claims, benefits).
• Experience implementing OAuth 2.0 / OIDC and SMART on FHIR.
• Hands-on experience with Azure, Kafka (or equivalent), and MongoDB and/or relational databases.
• Experience building and operating cloud-native microservices.
• Strong communication skills and ability to work in regulated environments.

Preferred Qualifications

• Experience with Bulk FHIR ($export) and asynchronous workflows.
• Familiarity with X12 transactions (270/271, 834, 835, 837).
• Experience with HL7 v2 or CDA/CCDA.
• Knowledge of terminology services (SNOMED CT, LOINC, RxNorm).
• Experience with API gateways (Azure APIM, Apigee, Kong).
• Familiarity with Infrastructure as Code (Terraform, Bicep).
• Experience with observability tools (Open Telemetry, Prometheus, Grafana).
• Prior experience with CMS/ONC interoperability initiatives or payer programs.