FHIR Subscription expertise anchors this senior Full Stack Developer contract with Russell Tobin & Associates in hybrid Toronto, Ontario. Build event-driven health integrations using Java, Node.js, and AWS Lambda. The senior developer will implement FHIR Subscription and SubscriptionTopic workflows for a public-sector client. The work spans REST APIs, asynchronous queues, React, SMART on FHIR, and production application logic. You will also support Ontario digital health integrations through NextGen Connect and HL7 v2. Key Responsibilities:

Define FHIR SubscriptionTopic triggers, filters, notifications, and conformance requirements Implement subscription creation, validation, activation, renewal,



and deactivation Develop Java and Node.js services processing notification Bundles Build AWS Lambda and queue-based asynchronous event integrations Support React applications using SMART on FHIR workflows Requirements:

Advanced FHIR Subscription and SubscriptionTopic implementation experience Senior-level Java, Node.js, REST API, and FHIR integration experience Hands-on AWS Lambda, asynchronous queues, retries, and idempotency experience Robust React and SMART on FHIR development experience NextGen Connect, HL7 v2, and Ontario digital health experience Apply senior Java, Node.js, FHIR, React, and AWS integration expertise to Toronto public-sector healthcare workflows.

📌 Senior FHIR Integration Developer Toronto
🏢 Russell Tobin
📍 Toronto