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Added 6 days ago
RT
Senior Software Engineer
Russell Tobin
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- $80 to $85 CAD / hour
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Senior Java Full Stack Developer
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The JAVA Full Stack Senior Developer role is an intermediate level position responsible for participation in the establishment and implementation of new or revised application systems and…
Added 6 days ago
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Senior Full Stack Developer
StafinGo
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- $85 to $100 CAD / hour
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NextGen Connect (Mirth) channels and configurations for HL7 v2 ingestion, processing, validation, routing, acknowledgement handling, and integration with Java services.
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Software Developer - Full Stack - Senior (Java exp with Healthcare FHIR.HL7 experience)
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Java Full Stack Engineer ( AI Engineering)
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Principal Software Engineer - .Net/C#
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- $150,000 to $200,000 CAD / year
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Added 6 days ago
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Java Software Engineer
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- $100 to $110 CAD / hour
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Principal Software Engineer - .Net/C#
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.Net Software Engineer
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StafinGo

Senior Full Stack Developer

Toronto, ON, Canada

$85 to $100 CAD / hour · Contract

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Job details

Pay: $85 to $100 CAD / hour
Job type: Contract
Apply by: Nov 20, 2026
Posting language: English
Posted: Oct 21, 2026

Original job description

Hiring: Senior Full Stack Developer

Location: Toronto, Ontario, Hybrid (3 days a week in office)

Duration: November 23, 2026 – May 20, 2027

Hourly Rate: $85/hour - $100/hour (based on experience)

Client: Public Sector - Healthcare

Responsibilities:

Design, develop, test, and support the Java Spring Boot server that will replace the legacy HRM solution within OCRE.
Use HAPI FHIR to parse, validate, transform, create, and process FHIR R4 and DSTU2 resources used by OCRE services and integrations.
Develop and maintain NextGen Connect (Mirth) channels that receive and process HL7 v2 messages and securely send the resulting content to Java services.
Implement clinical report processing, routing, acknowledgements, exception handling, and operational controls in accordance with the Ontario HRM Standard.
Integrate OCRE services with Ontario Health Enterprise Pub/Sub and the applicable FHIR Subscription workflows.
Develop and support a ReactJS application that allows EMR users to manage OCRE subscription preferences for individual physicians.
Translate preference selections captured in the user experience into valid FHIR Subscription and Ontario Health Enterprise Pub/Sub filter criteria.
Implement OAuth 2.0, mTLS, authorization controls, secure configuration, audit logging, and privacy-aware handling of clinical information.
Package and configure application components as Docker containers and support their deployment, configuration, monitoring, and troubleshooting.
Create and maintain unit, integration, interface, conformance, regression, and end-to-end tests across HL7 v2, FHIR, Pub/Sub, backend, and ReactJS components.
Collaborate with architecture, product, UX, security, privacy, QA, operations, and EMR integration stakeholders to refine requirements and deliver production-ready functionality.
Prepare technical designs, interface specifications, message and resource mappings, configuration documentation, deployment notes, runbooks, and knowledge-transfer materials.

Deliverables:

A production-ready Java Spring Boot server that implements the assigned OCRE capabilities and supports replacement of the legacy HRM solution.
HAPI FHIR components for parsing, validating, transforming, creating, and processing FHIR R4 and DSTU2 resources.
NextGen Connect (Mirth) channels and configurations for HL7 v2 ingestion, processing, validation, routing, acknowledgement handling, and integration with Java services.
Ontario HRM Standard mappings, processing rules, conformance artifacts, and exception-handling components required by the assigned workflows.
Integration components connecting OCRE services with Ontario Health Enterprise Pub/Sub and the applicable FHIR Subscription workflows.
ReactJS components that allow EMR users to create and manage physician-specific OCRE subscription preferences.
Preference-to-filter mapping logic that produces valid FHIR Subscription and Ontario Health Enterprise Pub/Sub filter criteria.
OAuth 2.0, mTLS, secure configuration, audit logging, and Docker packaging required for deployment and operation of the solution.
Unit, integration, interface, conformance, regression, and end-to-end test assets, together with defect fixes and release validation support.
Technical designs, API and interface specifications, message and resource mappings, configuration notes, deployment instructions, runbooks, demos, and release-support materials.

Must Haves:

Java, Spring Boot, REST API, and HAPI FHIR development experience, including hands-on processing of FHIR R4 and DSTU2 resources in production-grade services.
NextGen Connect (Mirth) and HL7 v2 integration experience, including transformation, validation, routing, acknowledgements, error handling, Java-service integration, and practical experience with the Ontario HRM Standard.
ReactJS full-stack development experience and hands-on knowledge of FHIR Subscriptions and Ontario Health Enterprise Pub/Sub, including translating physician-level preferences into subscription filter criteria.
Secure application and container delivery experience using OAuth 2.0, mTLS, Docker, automated testing, configuration management, audit logging, and production troubleshooting.

Required Experience:

Senior-level hands-on experience developing Java and Spring Boot services and REST APIs, including use of the HAPI FHIR library to process FHIR R4 and DSTU2 resources.
Hands-on experience with NextGen Connect (Mirth), HL7 v2 message processing, transformation, validation, routing, acknowledgements, and integration with Java services.
Experience in Ontario HRM Standard and hospital clinical report exchange workflows.
Strong ReactJS development experience building production user interfaces and integrating them with Java/Spring Boot services and FHIR APIs.
Experience with FHIR Subscriptions and event-driven integrations, including translating physician-level user preferences into filter criteria for the FHIR R4B or R5 Subscriptions with OAuth 2.0 and mTLS for secure service-to-service and application integration.

Desired Skills:

Experience modernizing a hospital clinical report exchange platform, with detailed knowledge of Ontario HRM specifications, routing, acknowledgements, exception handling, and conformance.
Experience with FHIR Subscription and SubscriptionTopic concepts, subscription filtering, practitioner-based routing, and FHIR profile validation using HAPI FHIR tooling.
Experience designing accessible ReactJS user experiences for configuration, preference management, or administrative workflows.
Experience with automated build, test, container scanning, and deployment pipelines for Java, ReactJS, NextGen Connect, and Docker components.
Experience supporting production healthcare integrations, including observability, reconciliation, incident investigation, replay or recovery procedures, and operational documentation.

We appreciate all interest; however, only candidates whose experience fully meets the posted requirements will be considered.

Interested?

If you meet the above criteria apply now!

**AI is not being used in the application/recruitment process for this position**

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More about this job

Responsibilities

Develop and support Java Spring Boot services, HAPI FHIR components, Mirth channels, and ReactJS features to replace the legacy OCRE HRM solution and support clinical report exchange. Integrate HL7 v2, FHIR subscriptions, and Ontario Health Enterprise Pub/Sub while implementing security, testing, deployment, operational support, and technical documentation.

Requirements

Requires senior-level hands-on experience with Java, Spring Boot, REST APIs, HAPI FHIR, FHIR R4 and DSTU2, Mirth, HL7 v2, and Ontario HRM workflows. Candidates must also have strong ReactJS and FHIR Subscription integration experience, including secure OAuth 2.0 and mTLS implementation, Docker delivery, automated testing, and production troubleshooting.

Skills

Java
Spring Boot
REST APIs
HAPI FHIR
FHIR R4
FHIR DSTU2
NextGen Connect (Mirth)
HL7 V2
Ontario HRM Standard
ReactJS
FHIR Subscriptions
Ontario Health Enterprise Pub/Sub
OAuth 2.0
Mutual TLS (mTLS)
Docker
Automated Testing

Visa sponsorship

Not detected in the job text

Keywords

Java
Spring Boot
REST APIs
HAPI FHIR
FHIR R4
FHIR DSTU2
FHIR R4B
FHIR R5
FHIR Subscriptions
SubscriptionTopic
NextGen Connect
Mirth
HL7 V2
Ontario HRM Standard
Ontario Health Enterprise Pub/Sub
ReactJS
OAuth 2.0
Mutual TLS
Docker
Automated Testing
Clinical Report Exchange
Healthcare Integration
Message Transformation
Message Routing
FHIR Profile Validation
Audit Logging
Conformance Testing
Production Troubleshooting
Event-Driven Integration
Privacy-Aware Data Handling

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