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Added 1 day ago
OD
Warehouse Worker- Distribution Center
Overhead Door
Tecumseh, ON · Windsor, ON
- Full-time
Basic computer skills for inventory management.
Added 1 day ago
TG
Project Manager, Glazing
Triumph Group of Companies
Toronto, ON · Greater Toronto Area, Canada
- Full-time
5 to 8 years of project management experience in the glazing, fenestration, or building envelope industry
Added 1 day ago
TT
Technology Lead Enterprise Platforms and Operations
Tundra Technical Solutions
Toronto, ON
- $140,000 to $145,000 CAD / year
- Full-time
…and Gemini/AI initiatives. Establish governance, lifecycle management, and security guardrails in partnership with Cybersecurity and Risk…
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TE
Director Of Sales
The Erb Group
Vaudreuil-Dorion, QC
- Full-time
The role is structured around approximately 70% team leadership and 30% individual sales contribution, including account management and business development.
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PL
Mine Engineer/Planner - PL#43148
Peter Lucas
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- $130,000 to $160,000 CAD / year
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Peter Lucas Project Management invests in people and community to provide gold standard project delivery. We are currently looking for an experienced Mine Engineer / Planner to join our…
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RD
Technical Project Manager
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- Full-time
…business strategy and execution by leading distributed Agile delivery teams, driving continuous process improvement, and implementing scalable solutions across Canadian capital…
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B
Sr. Java Fullstack Developer-Angular/Banking
BeachHead
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- $59.48 to $79.66 CAD / hour
- Contract
…Fullstack Developer-Angular/Banking to join a collaborative Agile delivery pod supporting a large-scale platform modernization initiative. You will contribute to the development, testing,…
Added 1 day ago
PL
Mine Engineer/Planner - PL#43148
Peter Lucas
Timmins, ON
- $130,000 to $160,000 CAD / year
- Full-time
Peter Lucas Project Management invests in people and community to provide gold standard project delivery. We are currently looking for an experienced Mine Engineer / Planner to join our…
Added 1 day ago
CO
Director of Development Engineering
City of Brantford
Waterloo, ON
- Full-time
…expectations, mentors staff, and promotes best practices in project delivery and software-supported engineering workflows. The position also involves preparing reports and recommendations…
Added 1 day ago
VS
Senior Software Developer
vTech Solution Canada
Toronto, ON
- Contract
Implement Subscription creation, validation, activation, status management, renewal, deactivation, delivery configuration, heartbeat handling, event retrieval, and subscriber lifecycle…
Added 1 day ago
P
Scrum Master
Procom
Toronto, ON
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…Fraud Technology team. This role focuses on supporting agile delivery of enhancements within Fraud applications in a high-pressure FinTech environment, ensuring outcomes are aligned with…
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CC
Business Developer
Canada Controls
Mississauga, ON
- $90,000 to $150,000 USD / year
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…products blend innovation and solutions for customized facility management and improved building efficiency when it comes to HVAC, security, energy, lighting, gas-detection and…
Added 1 day ago
QT
Building Science Lead
QEA Tech
Toronto, ON · Greater Toronto Area, Canada
- Full-time
…the same time, they will remain actively involved in project delivery, including complex building envelope investigations, energy modelling, retrofit planning, technical analysis, and…
Added 1 day ago
P
Manager, Data Integration
Prophix
Toronto, ON · Etobicoke, ON
- Full-time
…direct accountability for code ownership and ongoing software management after go-live, not a one-time delivery…
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PC
Project Manager
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ON · Niagara, ON
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…earthworks, mobile crushing, environmental remediation, project management and development, and material hauling and…
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MI
Business Project Manager, financial field
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Business project management, senior and versatile profile (client note)
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FG
Commercial Lines Account Manager (Trucking/Fleet/Transportation)
FSB GROUP LTD.
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- $60,000 to $90,000 CAD / year
- Full-time
Review policy and renewal documents for accuracy prior to delivery to clients.
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OC
Implementation Consultant, Ivalua
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Calgary, AB
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University degree or diploma in Supply Chain Operations, Information Technology Management, Business Operations Management, or International Business Management
Added 1 day ago
K
Payroll Specialist
Kelly
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…while ensuring accuracy, compliance, and exceptional service delivery. This opportunity is ideal for a payroll professional who thrives in a fast-paced environment and enjoys collaborating…
Added 1 day ago
U
Seasonal Delivery Helper - Kamloops
UPS
Kamloops, BC
- Full-time
We are hiring delivery driver helpers in your city! Although the role can be physically challenging and fast paced at times, the positive impact you have on our customers will leave you…
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D
Lead, Forward Deployed Engineering
Deliverect
Toronto, ON
- Full-time
…evolving digital landscape, streamlining digital ordering for delivery and on-premise services. We are committed to creating user-friendly, dependable, and scalable technology that…
Added 1 day ago
B
Lead, Management Operating System (MOS) Design
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- $122,000 to $150,000 CAD / year
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Brunel is seeking an experienced Lead, Management Operating System (MOS) Design to support the design, development, documentation and continuous improvement of a Management Operating System…
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SS
Head of Manufacturing
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Own master production scheduling, MRP, and work-order management; capacity and production-readiness reviews; and on-time delivery, WIP, and bottleneck control.
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BG
Service Technician - Shop_CA
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BG
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vTech Solution Canada

Senior Software Developer

Toronto, ON, Canada

Contract

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Job details

Job type: Contract
Apply by: Nov 29, 2026
Posting language: English
Posted: Oct 30, 2026

Original job description

Job Title: Sr. Software Developer - Full Stack

Location: Toronto, ON

Work Mode: Hybrid (Onsite as needed basis)

Duration: 6 months contract

Description:

The Agency requires 2 Senior Full Stack Developers to support the Enterprise Pub/Sub Applications Team. The resources will update The Agency applications and associated workflows to integrate with the Agency Enterprise Pub/Sub service, which is based heavily on FHIR Subscription and SubscriptionTopic. The work will replace scheduled polling with subscription-driven event processing where appropriate so applications can respond when clinical information, referrals, reports, status changes, or other relevant events become available. The roles spans FHIR event architecture, backend, serverless integration, interface, and user-interface development. The resource will define and implement FHIR Subscription and SubscriptionTopic behaviour; build Java and Node.js services, AWS Lambda functions, and queue-based event-processing components; develop React applications that use SMART on FHIR; and configure NextGen Connect (Mirth) channels for HL7 v2 workflows. The work includes subscription lifecycle management, filtering, notification handling, application and workflow changes, testing, monitoring, and transition of existing polling processes.

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

Total: 100 Points

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More about this job

Responsibilities

Design and implement FHIR Subscription and SubscriptionTopic workflows, Java and Node.js services, AWS Lambda and queue-based event processing, React applications using SMART on FHIR, and HL7 v2 integrations through NextGen Connect. Test, monitor, secure, and support these integrations, including reliable event handling, clinical workflow updates, operational documentation, and transition from polling-based processes.

Requirements

Requires advanced hands-on experience with FHIR Subscription and SubscriptionTopic, Java and Node.js development, AWS Lambda and asynchronous event processing, and production React applications using SMART on FHIR. Also requires NextGen Connect (Mirth), HL7 v2, and Ontario digital health integration experience, including HRM, Provider Registry, Client Registry, and eReferral.

Skills

FHIR Subscriptions
FHIR SubscriptionTopic
Java
Node.js
AWS Lambda
Asynchronous Queues
React
SMART on FHIR
HL7 v2
NextGen Connect (Mirth)
REST APIs
Event-Driven Architecture
AWS Messaging Services
FHIR Integration
Ontario Digital Health Standards
Automated Testing

Visa sponsorship

Not detected in the job text

Keywords

FHIR
FHIR Subscription
SubscriptionTopic
FHIR R5
Java
Node.js
React
SMART on FHIR
AWS Lambda
Amazon SQS
Amazon SNS
Amazon EventBridge
Amazon API Gateway
Amazon CloudWatch
HL7 v2
NextGen Connect
Mirth
REST APIs
Notification Bundles
Event-Driven Architecture
Asynchronous Queues
Idempotency
Dead-Letter Handling
Hospital Report Manager
Provider Registry
Client Registry
eReferral
Ontario Digital Health Standards
Personal Health Information
Infrastructure as Code

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