Senior UI Software Engineer

We are seeking a highly skilled Senior Software Developer - Full Stack to lead the development, modernization, and integration of modern full-stack application components. In this role, you will build provider- and patient-facing web interfaces using ReactJS while engineering secure backend microservices and APIs with Java Spring Boot. Acting as a specialist in healthcare interoperability and system integration, you will connect full-stack applications with hospital information systems (HIS) like Epic, Cerner, and MEDITECH using SMART on FHIR, FHIR APIs, HL7v2 interfaces, and the Mirth integration engine.

Duration: 8-month contract

Public Sector Experience: Must Have

Specialized High-Demand Tech Stack: Work hands-on across ReactJS, Java Spring Boot, SMART on FHIR, FHIR APIs, and Mirth.

Direct Integration Impact: Connect modern full-stack web applications with leading enterprise platforms including Epic, Cerner, and MEDITECH.

Drive full-lifecycle software delivery from UI design and microservice engineering to interface testing.

Flexible Hybrid Setup: Design, build, test, and support responsive ReactJS frontend UI components and robust Java Spring Boot microservices and REST APIs.

Hospital Information System (HIS) Integration: Design, build, test, and troubleshoot HL7v2 and FHIR message transformations, routing rules, validations, error queues, and reconciliation flows using Mirth.

Integrate scheduling, encounter, provider, patient, and clinical workflows across web applications and underlying data stores.

Build modern, standards-based, and maintainable software components to support the retirement and replacement of legacy application infrastructure.

Quality Assurance & Testing Support: Technical Documentation & Governance: Author comprehensive technical designs, API specs, interface guidelines, data mapping documents, deployment notes, and operational support materials.

Hospital Information System (HIS) Integrations: 5+ years of hands-on experience integrating application systems with HIS platforms such as Epic, Cerner, or MEDITECH (Strictly Required).

Hands-on experience with Mirth integration engine for HL7v2 message routing, transformations, validations, and production troubleshooting (Strictly Required).

ReactJS Frontend Proficiency: Strong hands-on ReactJS development experience building complex production web application interfaces (Strictly Required).

Java & Spring Boot Backend Mastery: Strong experience developing microservices, REST APIs, and backend integration components using Java and Spring Boot (Strictly Required).

Experience with clinical scheduling, encounter workflows, patient/provider context handling, audit logging, and building secure, scalable healthcare components (Strictly Required).

Public Sector Expertise: Prior experience delivering software development and integration within public sector environments (Strictly Required).

Nice-to-Have Assets:

If you're interested in the "Senior Software Developer - Full Stack" role based in Toronto, we encourage you to apply online at

As a result, we are committed to developing and implementing strategies to increase the equity, diversity and inclusion within the workplace by examining our internal policies, practices, and systems throughout the entire lifecycle of our workforce, including its recruitment, retention and advancement for all employees. In addition to our deep commitment to respecting human rights, we are dedicated to positive actions to affect change to ensure everyone has full participation in the workforce free from any barriers, systemic or otherwise, especially equity-seeking groups who are usually underrepresented in Canada's workforce, including those who identify as women or non-binary/gender non-conforming; Indigenous or Aboriginal Peoples; persons with disabilities (visible or invisible) and; members of visible minorities, racialized groups and the LGBTQ2+ community.

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