Full Stack Developer (3) – our client requires three (3) developers to support a multi-year enterprise modernization initiative focused on decomposing a legacy monolithic platform into modular, interoperable services and establishing the technical foundation for a future-state digital solution. Developers will design, develop, enhance, and maintain secure, scalable, high-performing enterprise web applications and backend services using the Microsoft technology stack, .NET, Angular, Azure cloud services, SQL Server, and REST API development

Work is hybrid with 3 days per week onsite at client location in Toronto, ON.

Deliverables Include:

- Develop functionalities per business requirements.
- Migrate applications from .NET Framework 4.x to .NET Core/.NET.
- Design, develop, and implement secure RESTful APIs.
- Develop up-to-date Angular web front-ends and migrate existing AngularJS applications to Angular.
- Develop and optimize data access and database operations, including query and performance optimization.
- Conduct performance testing and tuning to improve application scalability, responsiveness, and reliability.
- Implement and enhance application security, including authentication, authorization, and secure API practices

Mandatory Requirements Include:

- Modernization & Legacy Transformation Experience: Demonstrated experience decomposing monolithic applications into modular services, APIs, or microservices. Experience developing modernization roadmaps and executing phased migrations with minimal business disruption.
- .NET Core / Backend Engineering Expertise: Advanced expertise in ASP.NET Core, REST API development, dependency injection, authentication/authorization, performance optimization,



and enterprise application architecture.
- Angular Front-End Development Expertise: Experience designing and developing Angular applications, component-based architecture, state management, responsive UI design, and integration with REST services.
- Solution Architecture & Design Skills: Ability to design scalable, maintainable, secure, and loosely coupled solutions. Experience with DDD, API-first design, event-driven architecture, integration patterns, and modular architecture.
- Public Sector experience is preferred

Desirable Requirements Include:

- Healthcare System Integration: Experience developing and supporting integrations between healthcare applications and systems.
- HL7: Familiarity with HL7 standards and healthcare messaging, including experience troubleshooting HL7 interfaces.
- FHIR: Knowledge of FHIR standards, resources, APIs, and modern healthcare interoperability.
- Mirth Connect: Hands-on experience developing, configuring, monitoring, and troubleshooting Mirth Connect channels and integrations.

Est. Start Date: Oct 19, 2026

Est. Duration: till Oct 4, 2027 + pos. extension

Location: Toronto, Ontario (Hybrid)

Posting#: 57065

Application question(s):

- Angular, UI design & REST Services integration experience Y/N?
- Tell me about your public sector experience.
- Healthcare System Integration Y/N?
- Describe your work with HL7 interfaces, FHIR standards, APIs.
- Mirth Connect channels & integrations experience Y/N?

Experience:

- ASP.NET Core, REST API development: 10 years (required)
- Migration (NET Framework 4.x to .NET Core/.NET): 10 years (required)

Language:

- English (required)

Work Location: Hybrid remote in Toronto, ON (Toronto District)

📌 Full Stack Developer #57065 (Canada)
🏢 Intellex Systems
📍 Canada