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Added 7 hours ago
H
Support Engineer
HCLTech
Vancouver, BC
- $77,000 to $87,000 CAD / year
- Full-time
We are seeking a skilled and proactive Android Support Engineer with 5–7 years of experience in Android application development and production support. The ideal candidate will have strong…
Added 7 hours ago
SG
Programmer Analyst - Java and PL/SQL
Societe Generale
Montreal, QC
- Full-time
Autonomous on your developments, you will always have the support of the team to continuously improve functionally and technically. You will be encouraged to also share your point of view…
Added 7 hours ago
F
Software Consultant
FireFlink
Toronto, ON
- Full-time
…integration, testing, deployment readiness, troubleshooting, production support, and continuous improvement. At the Technical Consultant III level, you will also provide hands-on technical…
Added 7 hours ago
OP
Associate Software Engineer - Full Stack
Ontario Power Generation
Oshawa, ON
- Full-time
Minimum of 4 years of relevant software development experience, including development, testing, maintenance, and support of production applications.
Added 7 hours 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 7 hours ago
B
Sr. Java Fullstack Developer-Angular/Banking
BeachHead
Toronto, ON
- Contract
Working with one of our top financial clients, this role calls for a Software Developer 3 - Java to join a collaborative Agile delivery pod supporting a large-scale platform modernization…
Added 7 hours ago
DI
Full Stack Developer(Angular)
Dawn InfoTek
Toronto, ON
- Contract
Support production environments, including monitoring and troubleshooting
Added 8 hours ago
O
Manager, Software Development
OpenText
Richmond Hill, ON
- Full-time
…software engineers and technical specialists working across Java-based cloud services, Python-based AI and document intelligence, React user experiences, enterprise integrations, and…
Added 9 hours 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 13 hours ago
WMS Software Developer [OPERATIONS TECHNOLOGY]
HelloFresh
Toronto, ON
Support integrations between the WMS and upstream and downstream systems, including production technology, ERP, and Kafka-based messaging.
Added 14 hours ago
M
Software Engineer -Data Processing Backend
Morningstar
Toronto, ON
- Full-time
Participate in a rotating on-call schedule to support production systems and maintain operational reliability.
Added 14 hours ago
R
Software Development Engineer II (SDE2), Trust Experience
Remitly
Burnaby, BC
- Full-time
Own features or functional areas from technical design through production support.
Added 14 hours ago
M
Full-Stack Developer
McAfee
Toronto, ON · UNAVAILABLE, Ontario
- Full-time
McAfee VPN is seeking a Full-Stack Developer to build and maintain the services and experiences that support our VPN products. You’ll work across the stack, with deep ownership of the Scala…
Added 15 hours ago
Senior Software Dev Engineer, Route 53 Health Checks and Console Core
Amazon
Vancouver, BC
- Operate what you build. Take part in on call, own metrics and alarms, and drive root cause analysis on production issues.
Added 15 hours ago
C
Senior Java API Developer (Spring Boot / AWS / Kafka)
CGI
Halifax, NS
- Full-time
CGI is seeking an experienced Senior Java API Developer to join our team and contribute to the design, development, and modernization of secure, scalable enterprise applications. In this…
Added 15 hours ago
Staff Software Engineer, Identity Threat Protection
Okta
Toronto, ON
…products - leading the charge from initial concept to final, production-ready…
Added 16 hours ago
Senior Manager Development, Treasury Technology
Scotiabank
Toronto, ON
…Management. The team provides development, integration, and support services for Treasury functions including Structural Interest Rate Risk Management (SIRR), Asset Liability Management…
Added 16 hours ago
SG
Sr. Forward Deployed Engineer
Software Guidance & Assistance, Inc. (SGA, Inc.)
Mississauga, ON
- Full-time
Rapidly prototype and deliver production-ready applications - using Java or Python, whichever best fits the use case - that solve real trading, risk, and operational problems.
Added 17 hours ago
GM
Senior Software Developer - CI/CD and Software Development Tools
General Motors
Markham, ON
- Full-time
…and operating cloud-based CI/CD platforms and pipelines that support GM’s embedded software production and large-scale virtualized test…
Added 17 hours ago
MI
Intermediate Full-Stack Developer
Method Integration Inc.
Remote, Canada
- $70,000 to $90,000 CAD / year
- Full-time
- Remote
As an Intermediate Full-Stack Developer on the Growth team, you'll build the experiments that decide how new users sign up, find value and subscribe to Method. You'll ship real changes to…
Added 18 hours ago
DF
Full-Stack Automation Engineer
DUCA Financial Services Credit Union Ltd.
Toronto, ON · North York, ON
- Full-time
…building, and maintaining of robust automation solutions that support DUCA’s automation strategy across integration, process automation, and quality engineering. This role is highly…
Added 23 hours 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 23 hours ago
M
RQ00831 - DevOPS/Cloud Engineer - Senior
Maarut
Toronto, ON
- Contract
…Connect environments behind Application Load Balancers, including Java and Python workloads, container images, task definitions, services, channel deployment and promotion, environment…
Added 1 day ago
SL
Senior Software Engineer, Operations – Core Java & iOS focus
Sun Life
Toronto, ON · Waterloo, ON · Sun Life Waterloo King
- Full-time
Develop, enhance, test, and support full-stack Java applications, services, and APIs, with ongoing ownership from implementation through production support.
Added 1 day ago
VI
Senior Java/J2ee Developer
Veriday Inc.
Mississauga, ON
- Contract
Veriday Inc. is looking for a Senior Java Spring Developer for one of our reputed Banking clients for a 6-month contract with potential extension. You'll join the Spread Products Risk and…

Maarut

RQ00828 - Software Developer - Full Stack - Senior

Toronto, ON, Canada

Contract

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Job details

Job type: Contract
Posting language: English
Posted: Oct 29, 2026

Original job 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

Requirements

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

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More about this job

Responsibilities

The developer will design, implement, and maintain FHIR Subscription and SubscriptionTopic workflows to support clinical event-driven integrations. They will also develop and support Java, Node.js, and React applications while managing HL7 v2 message transformations and AWS-based asynchronous processing.

Requirements

Candidates must have advanced experience with FHIR Subscription models, Java, Node.js, and AWS Lambda for event-driven architectures. Proficiency in React, SMART on FHIR, and NextGen Connect (Mirth) for HL7 v2 integration within Ontario digital health standards is required.

Skills

FHIR
SubscriptionTopic
Java
Node.js
AWS Lambda
React
SMART on FHIR
NextGen Connect
Mirth
HL7 v2
REST APIs
Asynchronous queues
CloudWatch
System integration
Software development
Clinical workflows

Visa sponsorship

Not detected in the job text

Keywords

FHIR
SubscriptionTopic
Java
Node.js
AWS Lambda
React
SMART on FHIR
NextGen Connect
Mirth
HL7 v2
REST APIs
Amazon SQS
Amazon SNS
Amazon EventBridge
Amazon API Gateway
Amazon CloudWatch
Infrastructure as Code
Hospital Report Manager
Provider Registry
Client Registry
eReferral
Event-driven architecture
Idempotency
Dead-letter handling
Conformance testing
Clinical workflows
Enterprise Pub/Sub
System integration
Software development
Ontario digital health standards

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