Senior Full Stack Software Engineer (m/f/d)

We are seeking a highly skilled Senior Full Stack Software Developer for a 10-month contract in Toronto. You will be responsible for translating complex design intent into reusable, accessible, and performant front-end components while ensuring backend stability and seamless DevOps integration.

Duration: 10-month contract with potential for extension

High-Impact Work: Play a foundational role in how digital products are built and perceived across a major organization through design system governance.

Hybrid Technical/Creative Role: Engage both your analytical engineering side and your eye for quality interaction design.

js, Figma, and cloud-native Azure/AWS environments.

Build and maintain high-quality, reusable UI components using React, Angular, and Next.js.

Implement and govern Design Tokens, CSS variables, and modular CSS architectures (BEM, Utility-first) to ensure cross-platform UI consistency.

Application Design: Design and implement scalable web architectures, including REST APIs, security standards like OAuth, and IAM solutions such as Entra ID.

Cloud & DevOps: Lead the implementation of continuous integration and deployment (CI/CD) pipelines, ensuring the stack is optimized for speed and security.

Troubleshooting: Resolve complex technical problems arising in packages and libraries, providing high-level support for migrations and conversions.

Actively participate in design walkthroughs using Figma, balancing ideal design aesthetics with technical feasibility.

Identify gaps in the current system and suggest roadmap improvements to align technical updates with broader brand and product goals.

Mandatory Technical Skills

Senior-level experience in React, Angular, and Next.js.

Frontend Architecture: Strong experience in scalable CSS (BEM, Modular, Utility-first) and managing maintainable styling in large applications.

Backend & Security: Proven experience in database management, RESTful API development, and OAuth/Entra ID security protocols.

Ability to explain complex design and technical decisions clearly to non-technical stakeholders.

Nice to Have (Public Sector Asset)

Previous experience in the Ontario Public Service (OPS) or Public Sector.

Hands-on experience working specifically on a Design System project.

Familiarity with AWS, Drupal, or French language fluency.

If you are a Senior Developer who views code through the lens of design and has a passion for building scalable, accessible, and beautiful user experiences, we encourage you to apply today!

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.