senior software developer - full stack.

We are seeking a highly accomplished Senior Software Developer - Full Stack for an enterprise-level contract opportunity based in Toronto. In this role, you will take on a premier engineering capacity across both front-end and back-end streams, specializing in the architectural design, construction, and deployment of secure, cloud-native applications.

As a senior full-stack developer, you will bridge the gap between complex healthcare data exchange models and highly accessible, responsive user interfaces. Operating entirely onsite, you will collaborate with cross-functional technical teams to map business logic, write clean and optimized code, and containerize software components. This role demands an expert who can confidently utilize modern languages and microservices frameworks, implement strict data exchange standards, and ensure technical deliverables are completed smoothly within fast-paced environment lifecycles.

Location: Toronto, ON

Assignment Type: Onsite (5 days/week, 7.25 hours/day)

Contract Duration: 12 months (with potential for extension)

Advantages
Modern Full-Stack Control: Build end-to-end features combining reactive UI architectures with scalable backend microservices frameworks.

Cloud-Native Deployment: Advance your containerization expertise by working directly with Microsoft Azure and Azure Kubernetes Service (AKS).

Interoperability Domain Depth: Deepen your knowledge of digital health standards by implementing cutting-edge healthcare data exchange protocols.

Inclusive Engineering Focus: Refine your user-interface capabilities by designing web layers with an explicit focus on universal accessibility requirements.

Responsibilities
Component Architecture Design: Prepare and present detailed technical analyses and structural models to support software component designs for the project team.

Full-Stack Software Engineering: Analyze, design, code, test, debug, and document complex, multi-tier web applications using modern front-end and back-end languages.

Cloud & Containerization Management: Configure, manage, and deploy containerized application components within Microsoft Azure and Kubernetes environments.

Interface & Accessibility Development: Develop responsive, user-friendly graphical interfaces with a dedicated focus on meeting digital accessibility compliance mandates.

API & Data Exchange Integration: Design and construct high-performance RESTful web services that adhere strictly to modern healthcare data exchange protocols and reference frameworks.

Database & Storage Optimization: Create, optimize, and maintain complex relational and document-oriented schemas using modern database systems.

Agile Framework Collaboration: Participate actively in project focus groups, joint application design (JAD) sessions, daily scrums, and technical alignment meetings with infrastructure providers.

Critical Production Support: Provide ongoing technical investigations, environment troubleshooting, and software corrections for production-tier application systems.

Proactive Risk Mitigation: Identify, trace, and communicate systemic code issues, infrastructure requirements, and project risks to delivery management before they impact deployment schedules.

Protocol & Lifecycle Assurance: Review network, software, and hardware communication requirements to ensure all integration pieces conform to established technical templates and protocols.

Qualifications
Core Technical & Full-Stack Requirements
Multi-Engine Programming Fluency: Deep, hands-on software development experience writing code across a diverse technology stack including Java, JavaScript (ES6+), TypeScript, and Node.js.

Advanced Framework Expertise: Proven capability building microservices and web apps using Spring Framework, Quarkus, Angular 9+, and Angular Material.

Cloud Infrastructure Depth: Practical experience configuring and deploying applications inside cloud environments, specifically Microsoft Azure and Azure Kubernetes Service (AKS), or related alternatives (OpenShift, Docker, AWS).

Healthcare Interoperability Knowledge: Foundational understanding of digital healthcare data exchange standards, with a specific focus on Fast Healthcare Interoperability Resources (FHIR). (Familiarity with HAPI FHIR or SmileCDR platforms is considered a strong asset).

Database & Protocol Savvy: Solid experience managing data tiers utilizing PostgreSQL relational databases alongside an understanding of standard communication protocols ( SFTP, TCP/IP).

Business Rules Configuration: Structural familiarity with workflow or rules-engine automation tools such as Drools is an asset.

Engineering Methodologies & Software Design
Modeling & Specifications: Strong background in technical analysis, object-oriented software engineering, and utilizing UML diagramming to model software solutions.

Accessibility Compliance: Demonstrated experience designing user interfaces that comply with strict digital web accessibility standards (AODA guidelines).

Document Assembly Asset: Practical experience programmatically assembling dynamic PDF and Word documents is considered a beneficial asset.

Professional Leadership & Soft Skills
Risk Management Acumen: Exceptional capability to proactively profile, isolate, and mitigate development blockers or architecture constraints before they impact delivery timelines.

Consultative Articulation: Excellent verbal, written, and presentation communication skills, with polished ease when explaining technical system trade-offs to cross-functional teams.

Collaborative Execution: A reliable, detail-oriented team player with strong negotiation and interpersonal skills who maintains a proven track record for meeting strict project deadlines.

Summary
If you're interested in the Senior Software Developer - Full Stack role based in Toronto, we encourage you to apply online at Only qualified candidates will be contacted for the next steps. We look forward to hearing from you!

Randstad Canada is committed to fostering a workforce reflective of all peoples of Canada. 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.

Randstad Canada is committed to creating and maintaining an inclusive and accessible workplace for all its candidates and employees by supporting their accessibility and accommodation needs throughout the employment lifecycle. We ask that all job applications please identify any accommodation requirements by sending an email to View email address on randstad.com to ensure their ability to fully participate in the interview process.

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