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Added 1 day ago
HO
Senior Full-Stack Developer (Senior Digital Product Developer)
House of Commons of Canada Chambre des communes du Canada
Ottawa, ON
- Full-time
The House of Commons’ Digital Services and Real Property (DSRP) is currently looking to staff the Senior Full-Stack Developer (Senior Digital Product Developer) position.
Added 1 day ago
HO
Full-Stack Developer (Digital Product Developer)
House of Commons of Canada Chambre des communes du Canada
Ottawa, ON
- Full-time
The House of Commons’ Digital Services and Real Property (DSRP) is currently looking to staff several Full-Stack Developer (Digital Product Developer) positions.
Added 1 day ago
YC
Senior Developer, D365
Yoush Consulting
Toronto, ON
- Full-time
As a Senior Developer, Dynamics 365 your responsibilities will include:
Added 2 days ago
F
Senior Machine Learning Engineer
Fusemachines
Remote, Canada
- Contract
- Remote
We’re hiring a Senior Machine Learning Engineer to architect, build, and deploy high-performance machine learning systems that power technology stack. You will work across the entire ML…
Added 2 days ago
C
Application Programmer
Collabera
Mississauga, ON
- $70 to $80 USD / hour
- Full-time
We are seeking an experienced Senior Forward Deployed Engineer (FDE) with strong expertise in Java, Python, backend/full-stack development, and solution architecture. The ideal candidate…
Added 2 days ago
TC
Technical Business Analyst
Tata Consultancy Services
Montreal, QC
- Full-time
…is enabling its clients to transform themselves across the full AI stack, from infrastructure to…
Added 2 days ago
T
Senior Full Stack Developer – FHIR, Java, Node.js, AWS & Healthcare Integration
ThoughtStorm
Toronto, ON
- Contract
Hiring: Senior Full Stack Developer – FHIR & Healthcare Integration
Added 2 days ago
LM
Senior Software Engineer - Product Lead - ISS Team
Lockheed Martin
Ottawa, ON
- $102,750 to $134,750 USD / year
- Full-time
Proven Full-Stack development experience throughout the software engineering processes from planning, design, development to deployment.
Added 2 days ago
MI
FHIR Integration Engineer/Full Stack Engineer (Healthcare) 7+ years of experience
Maarut Inc
Toronto, ON
- Contract
Senior-level experience developing Java and Node.js services, REST APIs, FHIR integrations, event publishers and consumers, and production application logic.
Added 2 days ago
LM
Senior Software Engineer - Product Lead
Lockheed Martin
Ottawa, ON
- Full-time
Proven Full-Stack development experience throughout the software engineering processes from planing, design, development to deployment.
Added 2 days ago
IG
Lead Full Stack Developer
Insight Global
Toronto, ON
- $50 to $70 CAD / hour
- Contract
Insight Global is seeking a hands-on Lead Full Stack Developer to support a major KYC transformation initiative within a large banking environment. This role will focus on both modernizing…
Added 2 days ago
C
Full Stack Senior Engineering Lead - Inventory Orchestration
Citi
Mississauga, ON
- Full-time
A Full Stack Senior Engineering Lead - Inventory Orchestration is a senior-level position responsible for leading the solutioning, design, and implementation of microservice-based…
Added 2 days ago
Senior, Cloud Engineering
Scotiabank
Toronto, ON
The Senior, Cloud Engineering role operates within the Cloud Platform Engineering team. This role specializes in Cloud Developer Experience (DevEx) Engineering, focusing on building tools,…
Added 2 days ago
Senior Software Dev Engineer, Route 53 Health Checks and Console Core
Amazon
Vancouver, BC
…infrastructure that every Route 53 console is built on. This is a full stack role. You will design and operate the services and APIs behind Route 53 Health Checks, and you will take our…
Added 2 days ago
P
Senior Data Developer
Plusgrade
Montreal, QC · CAN - Montreal
- Full-time
…systems to automate monitoring and data quality. You will take full ownership of optimizing our cloud infrastructure to ensure both high performance and cost…
Added 2 days ago
SG
Sr. Forward Deployed Engineer
Software Guidance & Assistance, Inc. (SGA, Inc.)
Mississauga, ON
- Full-time
The ideal candidate is already an experienced Full-Stack/Backend Architect (Java and/or Python) who thrives in ambiguous, fast-paced client environments, can rapidly translate complex…
Added 2 days ago
M
RQ00828 - Software Developer - Full Stack - Senior
Maarut
Toronto, ON
- Contract
Senior-level experience developing Java and Node.js services, REST APIs, FHIR integrations, event publishers and consumers, and production application logic.
Added 2 days ago
Technical Solutions Development Manager, Workspace, Google Cloud
Google
Waterloo, ON
…developed for security, reliability and scalability, running the full stack from infrastructure to applications to devices and hardware. Our teams are dedicated to helping our customers -…
Added 3 days ago
SL
Senior Software Engineer, Operations – Core Java & iOS focus
Sun Life
Toronto, ON · Waterloo, ON · Sun Life Waterloo King
- Full-time
We are looking for a Senior Software Engineer with strong full-stack Java experience and hands-on iOS development skills. You will develop and support reliable applications across the web,…
Added 3 days ago
TI
Full Stack Developers
Teckhorizon Inc
Toronto, ON
- Contract
Our Client is looking for experienced Senior Full Stack Developers to support enterprise healthcare integration initiatives involving FHIR Subscription, SubscriptionTopic, and event-driven…
Added 3 days ago
I
Software Developer - Full Stack - Senior (Health)
isgSearch
Toronto, ON · Greater Toronto Area, Canada
- Full-time
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…
Added 3 days ago
RT
Sr. Software Developer - Full Stack
Russell Tobin
Toronto, ON
- $90 to $95 CAD / hour
- Contract
Job Title: Sr. Software Developer - Full Stack
Added 3 days ago
C
VP Senior Software Engineer – Java & Distributed Systems
Citi
Mississauga, ON
- Full-time
We're looking for a senior engineer who thinks clearly across the full product development lifecycle, from design through to production, and brings an AI-first mindset to how they work.
Added 3 days ago
L
Senior Full Stack Developer (Java/React)
Luxoft
Toronto, ON
- Contract
We’re seeking a Senior Software Engineer to enhance a cross-asset order and position management system. The engineer shall have experience designing and building robust, scalable systems…
Added 3 days ago
C
Sr. Consultant, Full Stack Developer
CIBC
Toronto, ON
- Full-time
…projects involving multiple back-end systems. As a Sr. Consultant, Full Stack Developer you’ll assemble, implement and maintain easy, flexible, and personalized solutions that enhance the…

Russell Tobin

Sr. Software Developer - Full Stack

Toronto, ON, Canada

$90 to $95 CAD / hour · Contract

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Job details

Pay: $90 to $95 CAD / hour
Job type: Contract
Apply by: Nov 27, 2026
Posting language: English
Posted: Oct 28, 2026

Original job description

Russell Tobin & Associates is hiring on behalf of one of its esteemed clients.

Job Title: Sr. Software Developer - Full Stack

Location: Toronto, ON (Hybrid)

Duration: 124 Business Days with Possible Extension

Client: Public Sector

Pay Rate: $90 - $95/hr [CAD]

Description

Required Skills:

Strong hands-on experience with FHIR Subscription and SubscriptionTopic, including topic definitions, resource triggers, filter criteria, subscription status and lifecycle, notification Bundles, delivery channels, heartbeat notifications, and event retrieval.
Senior-level experience developing Java and Node.js services, REST APIs, FHIR integrations, event publishers and consumers, and production application logic.
Strong experience implementing FHIR Subscription and SubscriptionTopic workflows with AWS Lambda and asynchronous queues, including notification Bundle handling, retries, dead-letter handling, idempotency, concurrency, duplicate-event handling, and replay.
Strong React development experience building production applications that use SMART on FHIR launch, authorization, context, scopes, and FHIR API integration patterns.
Hands-on experience with NextGen Connect (Mirth), HL7 v2 integration, and Ontario digital health standards and provincial services, including the Hospital Report Manager (HRM) Standard, Provider Registry, Client Registry, and eReferral, covering message transformation, validation, routing, acknowledgements, error handling, conformance testing, and production support.

Responsibilities:

Assess polling-based integrations and workflows, identify the clinical or application events that should trigger notifications, and map each workflow to the appropriate FHIR SubscriptionTopic and Subscription behaviour.
Define, implement, and maintain SubscriptionTopic resources, including supported resource triggers, event definitions, filter parameters, notification shapes, and conformance requirements.
Implement Subscription creation, validation, activation, status management, renewal, deactivation, delivery configuration, heartbeat handling, event retrieval, and subscriber lifecycle controls.
Design, develop, test, and support Java and Node.js services that publish events, manage subscriptions, consume notification Bundles, call FHIR APIs, and route resulting actions to application workflows.
Develop and maintain AWS Lambda functions and queue-based integrations for asynchronous event processing, validation, enrichment, workflow coordination, and downstream application updates.
Implement reliable processing controls for idempotency, duplicate detection, retries, dead-letter handling, controlled concurrency, ordering where required, reconciliation, replay, and recovery.
Develop and support React applications that use SMART on FHIR to present subscription-related workflows, launch within supported contexts, obtain authorized FHIR access, and interact with FHIR resources and application APIs.
Develop and maintain NextGen Connect (Mirth) channels that receive, transform, validate, route, and acknowledge HL7 v2 messages and connect those workflows to FHIR resources, application services, and Enterprise Pub/Sub events.
Validate Subscription, SubscriptionTopic, notification Bundle, and related FHIR resource instances against the applicable FHIR definitions, The Agency profiles, terminology, and business rules.
Implement event correlation, structured logging, metrics, alerts, audit records, subscription health monitoring, and operational dashboards so teams can trace processing across publishers, Enterprise Pub/Sub, subscribers, and downstream applications.
Create and maintain unit, integration, contract, conformance, interface, regression, end-to-end, performance, and failure-recovery tests covering FHIR subscription workflows, backend services, serverless processing, HL7 v2, and React components.
Apply secure configuration, authentication, authorization, least-privilege access, privacy-aware logging, and appropriate handling of personal health information, and prepare technical designs, mappings, runbooks, and knowledge-transfer materials with project stakeholders.

Desired Skills:

Experience implementing the FHIR R5 Subscription model or the R5 subscription backport for earlier FHIR releases, including SubscriptionTopic, rest-hook or websocket delivery, status notifications, heartbeat notifications, and event retrieval.
Experience with AWS messaging, integration, and observability services such as Amazon SQS, Amazon SNS, Amazon EventBridge, Amazon API Gateway, and Amazon CloudWatch.
Experience with infrastructure as code, automated build and deployment pipelines, containerized workloads, configuration management, and automated security scanning.
Experience defining versioned FHIR profiles, event schemas, interface contracts, compatibility rules, correlation identifiers, and governance practices for shared enterprise integrations.
Experience using NextGen Connect (Mirth) to integrate with Ontario digital health standards and provincial services, including the Hospital Report Manager (HRM) Standard, Provider Registry, Client Registry, and eReferral, with hands-on responsibility for HL7 v2 transformation, validation, routing, acknowledgements, conformance testing, and production support.

Required Competencies:

Advanced FHIR Subscription and SubscriptionTopic experience, including resource triggers, filter criteria, lifecycle and status management, notification Bundles, delivery channels, heartbeat notifications, event retrieval, validation, and conformance testing.
FHIR Subscription and SubscriptionTopic implementation experience for event-driven clinical workflows, including topic and event design, subscription filters and lifecycle management, notification Bundle processing, asynchronous queue processing, idempotency, retries, dead-letter handling, duplicate-event handling, observability, replay, and production troubleshooting using Java, Node.js, and AWS Lambda.
React and SMART on FHIR experience, including launch and authorization flows, scopes, context handling, FHIR API integration, accessible user-interface development, automated testing, and secure handling of clinical information.
NextGen Connect (Mirth), HL7 v2, and Ontario digital health standards experience, including the Hospital Report Manager (HRM) Standard, Provider Registry, Client Registry, and eReferral, covering message transformation, validation, routing, acknowledgements, error handling, interface and conformance testing, production support, and integration with FHIR, Java, Node.js, or serverless components.

Rated Criteria:

Advanced FHIR Subscription and SubscriptionTopic experience, including resource triggers, filters, lifecycle and status management, notification Bundles, delivery channels, heartbeat notifications, event retrieval, validation, and conformance testing. 25 Points
Demonstrated FHIR Subscription and SubscriptionTopic implementation experience using Java, Node.js, AWS Lambda, and asynchronous queues, including topic and event design, subscription filters and lifecycle management, notification Bundle processing, idempotency, retries, dead-letter handling, duplicate-event handling, replay, observability, and production troubleshooting. 25 Points
React and SMART on FHIR experience, including launch and authorization flows, scopes, context handling, FHIR API integration, accessible user-interface development, and testing. 25 Points
NextGen Connect (Mirth) and HL7 v2 integration experience, including transformation, validation, routing, acknowledgements, error handling, interface testing, and integration with Ontario digital health standards and provincial services such as the Hospital Report Manager (HRM) Standard, Provider Registry, Client Registry, and eReferral. 25 Points

Deliverables:

FHIR SubscriptionTopic definitions and supporting artifacts that document event triggers, supported filters, notification content, delivery expectations, and conformance rules for assigned Enterprise Pub/Sub workflows.
Subscription lifecycle components for creation, validation, activation, status management, renewal, deactivation, delivery configuration, heartbeat handling, event retrieval, and subscriber support.
Updated Agency applications and workflows that integrate with Enterprise Pub/Sub and replace assigned polling-based processes with FHIR subscription-driven event processing.
Production-ready Java and Node.js services, APIs, publishers, consumers, adapters, and integration components for managing subscriptions and processing FHIR events and notifications.
AWS Lambda functions and queue-based processing components for validation, enrichment, retries, dead-letter handling, idempotency, duplicate detection, reconciliation, replay, and downstream updates.
React components that use SMART on FHIR launch, authorization, context, scopes, and FHIR APIs to support the assigned subscription and application workflows.
NextGen Connect (Mirth) channels and configurations for HL7 v2 ingestion, transformation, validation, routing, acknowledgement handling, error management, and integration with FHIR and event-processing components.
FHIR profiles, examples, validation rules, event and interface mappings, contract tests, conformance tests, integration tests, end-to-end tests, and release-validation evidence.
Structured logs, metrics, alerts, dashboards, subscription health monitoring, audit records, reconciliation controls, incident diagnostics, operational procedures, and production-support runbooks.
Technical designs, API and interface specifications, workflow documentation, security and configuration notes, deployment instructions, demonstrations, release-support materials, and knowledge-transfer artifacts.

Must Haves:

Advanced FHIR Subscription and SubscriptionTopic experience, including resource triggers, filters, lifecycle and status management, notification Bundles, delivery channels, heartbeat notifications, event retrieval, validation, and conformance testing. 25 Points
Demonstrated FHIR Subscription and SubscriptionTopic implementation experience using Java, Node.js, AWS Lambda, and asynchronous queues, including topic and event design, subscription filters and lifecycle management, notification Bundle processing, idempotency, retries, dead-letter handling, duplicate-event handling, replay, observability, and production troubleshooting. 25 Points
React and SMART on FHIR experience, including launch and authorization flows, scopes, context handling, FHIR API integration, accessible user-interface development, and testing. 25 Points
NextGen Connect (Mirth) and HL7 v2 integration experience, including transformation, validation, routing, acknowledgements, error handling, interface testing, and integration with Ontario digital health standards and provincial services such as the Hospital Report Manager (HRM) Standard, Provider Registry, Client Registry, and eReferral. 25 Points

Public Sector Experience: must have

If this opportunity matches your experience and career goals, please share your most updated resume for consideration.

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More about this job

Responsibilities

Design and implement FHIR SubscriptionTopic definitions and subscription lifecycle workflows, replacing polling-based processes with event-driven integrations using Java, Node.js, AWS Lambda, and asynchronous queues. Build and support SMART on FHIR React applications and Mirth/HL7 v2 integrations, while ensuring conformance, reliable event processing, security, observability, testing, and operational readiness.

Requirements

Requires advanced hands-on experience with FHIR Subscriptions and SubscriptionTopic, Java and Node.js services, AWS Lambda and queue-based event processing, and React applications using SMART on FHIR. Also requires NextGen Connect (Mirth), HL7 v2, Ontario digital health standards and services, and public sector experience; no education requirement is stated.

Skills

FHIR Subscriptions
FHIR SubscriptionTopic
Java
Node.js
AWS Lambda
Asynchronous Queues
React
SMART on FHIR
NextGen Connect (Mirth)
HL7 v2
REST APIs
FHIR Integrations
Amazon SQS
Amazon SNS
Amazon EventBridge
Ontario Digital Health Standards

Visa sponsorship

Not detected in the job text

Keywords

FHIR R5
FHIR Subscription
SubscriptionTopic
Notification Bundles
Java
Node.js
React
SMART on FHIR
AWS Lambda
Amazon SQS
Amazon SNS
Amazon EventBridge
Amazon API Gateway
Amazon CloudWatch
NextGen Connect (Mirth)
HL7 v2
REST APIs
Enterprise Pub/Sub
Hospital Report Manager (HRM)
Provider Registry
Client Registry
eReferral
Idempotency
Dead-Letter Handling
FHIR Profiles
Conformance Testing
Infrastructure as Code
CI/CD Pipelines
Personal Health Information
Public Sector

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