senior software developer- front end.

We are seeking a highly accomplished and technical Senior Software Developer - Front End for an enterprise-level contract opportunity based in Toronto. In this role, you will take on a premier engineering capacity within the front-end development stream, specializing in the architectural design, construction, and optimization of highly responsive web applications and cloud-native digital products.

As a senior front-end leader, you will bridge the gap between creative UI/UX designs and high-performance engineering. Operating entirely onsite, you will collaborate with cross-functional squads to translate storyboards and user stories into clean, reusable code. This role demands an expert who can seamlessly integrate user interfaces with secure backend RESTful APIs, manage complex client-side state, and deliver accessible software solutions that scale efficiently across all online and mobile platforms.

Location: Toronto, ON

Assignment Type: Onsite (5 days/week)

Contract Duration: 10 months (with potential for extension)

Advantages
Cutting-Edge Tech Stack: Engineer high-visibility, cloud-native web applications using modern frameworks like React, Next.js, and TypeScript.

Full-Lifecycle Ownership: Drive everything from rapid UI prototyping and interactive layout coding to advanced security optimization and automated testing.

Onsite Collaboration Ecosystem: Work in a highly interactive environment alongside product managers, business analysts, and backend industries to accelerate deployment timelines.

Stable Renewal Potential: Establish a secure career footprint with a robust initial 10-month runway backed by a strong potential for extension.

Responsibilities
Front-End Software Engineering: Design, build, and maintain high-quality single-page and server-rendered web interfaces that work seamlessly across desktop, online, and mobile devices.

UI/UX Translation: Partner closely with UI/UX designers to translate complex wireframes, storyboards, and responsive mobile layouts into performant, compliant production code.

API Integration: Formulate clean data-fetching logic to integrate dynamic front-end user interfaces smoothly with underlying RESTful APIs and modern web services.

Application Security & Hardening: Secure web applications following robust OWASP guidelines, configuring browser-based security controls, and managing modern access protocols.

Accessibility Compliance: Code and validate web solutions to meet strict digital accessibility compliance regulations using standard scanning tools and testing frameworks.

Agile Pipeline Participation: Work actively inside an Agile/Scrum delivery team, participating in sprint planning, daily stand-ups, technical task scoping, and system demos.

Ecosystem Version Control: Enforce modern repository practices by managing concurrent code paths, structured branching patterns, and executing thorough peer pull-request reviews.

Quality Assurance Support: Support end-to-end testing streams by writing unit tests, assisting with automated regression suits, and checking platform stability under load testing.

Tiered Application Support: Provide critical application support, incident investigation, root-cause troubleshooting, and deploy interim or long-term corrective fixes for production systems.

Technical Documentation: Maintain design consistency, adhere to established brand style guidelines, and generate comprehensive internal implementation documentation.

Qualifications
Core Technical Requirements
Front-End Ecosystem Mastery: Expert-level software development experience specializing in React, JavaScript (ES6+), and TypeScript.

Modern Framework Depth: Direct, hands-on experience building and deploying production-tier applications using Next.js and Node.js ecosystems.

Interface Design & Libraries: Strong command of responsive web design (HTML5, CSS3), core browser mechanisms, and common React libraries (such as Hook Form, React Query, or Zustand).

API Ingestion & Tooling: High proficiency fetching data from REST APIs, with practical experience utilizing Swagger-UI, Postman, and structured data serialization (JSON).

Secure Authorization: Deep operational knowledge of secure application architecture, web application firewalls (WAF), Cross-Origin Resource Sharing (CORS), and modern authentication standards like OAuth and JSON Web Tokens (JWT).

Web Accessibility Standards: Thorough knowledge of Web Content Accessibility Guidelines (WCAG) and automated validation or remediation tools (such as WAVE or AXE).

Preferred Capabilities
DevOps & Source Control: Expert familiarity with Git-based source management, continuous integration/continuous delivery (CI/CD) automated deployment pipelines, and build tool chains (npm).

Testing Automation: Structural exposure supporting frontend unit testing frameworks (e.g., Karma, Jasmine, Jest) or browser automation tools (such as Playwright) is highly valued.

Backend Exposure: Foundational awareness of backend architectural technologies, such as Java Spring Boot web services, is an asset.

Professional Soft Skills
Analytical Problem Solving: Superior critical thinking, analytical troubleshooting, and decision-making capabilities to resolve complex code anomalies under tight release windows.

Communication & Collaboration: Excellent verbal and written communication skills, with polished interpersonal ease when negotiating designs and presenting solutions to technical and non-technical stakeholders.

Adaptable Execution: A reliable, self-directed team player who manages competing project timelines effectively and maintains a strong track record for meeting fixed delivery deadlines.

Summary
If you're interested in the Senior Software Developer- Front End 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.

This posting is for existing and upcoming vacancies. show more