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isgSearch

Software Developer - Full Stack - Senior (Health)

Toronto, ON, Canada
Greater Toronto Area, Canada, Canada

Full-time

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Job details

Job type: Full-time
Apply by: Nov 27, 2026
Posting language: English
Posted: Oct 28, 2026

Original job description

Senior Full Stack Developer

We are seeking two Senior Full Stack Developers to enhance healthcare applications and integration's The focus is on replacing scheduled polling with event-driven processing so applications can respond to clinical information, referrals, reports, and status changes in real time.

Healthcare industry experience is mandatory. Candidates must have hands-on experience with healthcare applications, clinical workflows, and healthcare interoperability standards.
Required Skills - Must Have

Healthcare Experience: Demonstrated experience delivering healthcare applications, clinical integrations, or digital health solutions.
FHIR Subscription and SubscriptionTopic: Strong experience with resource triggers, filters, subscription lifecycle, notification Bundles, delivery channels, and event retrieval.
Backend Development: Senior-level Java, Node.js, REST API, and FHIR integration experience.
AWS and Event Processing: Experience with AWS Lambda, asynchronous queues, retries, dead-letter handling, idempotency, and duplicate-event management.
React and SMART on FHIR: Experience with React applications, SMART on FHIR launch and authorization, context, scopes, and FHIR API integration.
Healthcare Interoperability: Hands-on experience with NextGen Connect (Mirth), HL7 v2 messaging, message transformation, validation, routing, acknowledgements, and error handling.
Experience integrating healthcare systems and services, including HRM, Provider Registry, Client Registry, and eReferral.

Key Responsibilities

Design and implement FHIR Subscription and SubscriptionTopic functionality to support event-driven clinical workflows.
Develop and maintain Java and Node.js services, REST APIs, AWS Lambda functions, and queue-based event-processing components.
Build React applications using SMART on FHIR and integrate with FHIR resources and APIs.
Configure and maintain NextGen Connect (Mirth) channels for HL7 v2 messaging and healthcare system integration.
Implement reliable event processing, error handling, monitoring, logging, security, and audit controls.
Develop automated tests, validate FHIR resources, troubleshoot production issues, and prepare technical documentation.

FHIR Subscription and SubscriptionTopic: Advanced experience with subscription architecture, lifecycle management, filters, notifications, and conformance testing.
Backend and Event-Driven Integration: Java, Node.js, AWS Lambda, asynchronous queues, and reliable event processing.
React and SMART on FHIR: Front-end development, SMART authorization, context handling, and FHIR API integration.
Healthcare Interoperability: NextGen Connect (Mirth), HL7 v2, and integration with healthcare services such as HRM, Provider Registry, Client Registry, and eReferral.

Mandatory Requirement: Healthcare industry experience is essential. Candidates must demonstrate relevant hands-on experience with healthcare applications, clinical integrations, or healthcare interoperability.
Desired Skills and Experience

We are seeking two Senior Full Stack Developers to enhance healthcare applications and integrations The focus is on replacing scheduled polling with event-driven processing so applications can respond to clinical information, referrals, reports, and status changes in real time.
Healthcare industry experience is mandatory. Candidates must have hands-on experience with healthcare applications, clinical workflows, and healthcare interoperability standards.
Required Skills - Must Have
Healthcare Experience: Demonstrated experience delivering healthcare applications, clinical integrations, or digital health solutions.
FHIR Subscription and SubscriptionTopic: Strong experience with resource triggers, filters, subscription lifecycle, notification Bundles, delivery channels, and event retrieval.
Backend Development: Senior-level Java, Node.js, REST API, and FHIR integration experience.
AWS and Event Processing: Experience with AWS Lambda, asynchronous queues, retries, dead-letter handling, idempotency, and duplicate-event management.
React and SMART on FHIR: Experience with React applications, SMART on FHIR launch and authorization, context, scopes, and FHIR API integration.
Healthcare Interoperability: Hands-on experience with NextGen Connect (Mirth), HL7 v2 messaging, message transformation, validation, routing, acknowledgements, and error handling.
Experience integrating healthcare systems and services, including HRM, Provider Registry, Client Registry, and eReferral.
Key Responsibilities
Design and implement FHIR Subscription and SubscriptionTopic functionality to support event-driven clinical workflows.
Develop and maintain Java and Node.js services, REST APIs, AWS Lambda functions, and queue-based event-processing components.
Build React applications using SMART on FHIR and integrate with FHIR resources and APIs.
Configure and maintain NextGen Connect (Mirth) channels for HL7 v2 messaging and healthcare system integration.
Implement reliable event processing, error handling, monitoring, logging, security, and audit controls.
Develop automated tests, validate FHIR resources, troubleshoot production issues, and prepare technical documentation.
FHIR Subscription and SubscriptionTopic: Advanced experience with subscription architecture, lifecycle management, filters, notifications, and conformance testing.
Backend and Event-Driven Integration: Java, Node.js, AWS Lambda, asynchronous queues, and reliable event processing.
React and SMART on FHIR: Front-end development, SMART authorization, context handling, and FHIR API integration.
Healthcare Interoperability: NextGen Connect (Mirth), HL7 v2, and integration with healthcare services such as HRM, Provider Registry, Client Registry, and eReferral.
Mandatory Requirement: Healthcare industry experience is essential. Candidates must demonstrate relevant hands-on experience with healthcare applications, clinical integrations, or healthcare interoperability.

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More about this job

Responsibilities

Design and implement FHIR subscription capabilities and event-driven clinical workflows, and develop Java and Node.js services, REST APIs, AWS Lambda functions, and queue-based processing components. Build React applications using SMART on FHIR, configure Mirth channels for HL7 v2 integrations, and ensure reliable, secure, monitored, and well-tested systems with appropriate documentation.

Requirements

Candidates must have hands-on healthcare industry experience with healthcare applications, clinical workflows, integrations, or interoperability. They need senior-level Java and Node.js skills, advanced FHIR Subscription and SubscriptionTopic experience, AWS event-processing expertise, React and SMART on FHIR experience, and practical knowledge of Mirth and HL7 v2.

Skills

Healthcare Applications
FHIR Subscriptions
FHIR SubscriptionTopic
Java
Node.js
REST APIs
AWS Lambda
Asynchronous Queues
Event Processing
React
SMART on FHIR
NextGen Connect (Mirth)
HL7 v2
Healthcare Interoperability
Clinical Integrations
Automated Testing

Visa sponsorship

Not detected in the job text

Keywords

Healthcare Applications
Clinical Workflows
Clinical Integrations
Digital Health
FHIR
FHIR Subscription
SubscriptionTopic
Notification Bundles
Java
Node.js
REST APIs
AWS Lambda
Asynchronous Queues
Retries
Dead-Letter Handling
Idempotency
Duplicate-Event Management
React
SMART on FHIR
FHIR API Integration
NextGen Connect
Mirth
HL7 v2
Message Transformation
Message Validation
Message Routing
Event-Driven Processing
HRM
Provider Registry
Client Registry

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