Senior Frontend React Developer

Job Summary:

We are looking for an experienced Senior Frontend React Developer to join our growing team in Toronto. This role plays a critical part in building a robust, scalable, and personalized frontend for cutting-edge e-commerce applications using React.js and Next.js. The successful candidate will take ownership of both the design system development and micro-frontend architecture, contributing to a modular, maintainable, and high-performing user experience.

You will work closely with product designers, architects, and backend teams to develop a modern digital experience integrated with personalization platforms and headless CMS tools like Uniform, ContentStack, and CommerceTools.

Key Responsibilities:

• Build and maintain scalable and high-performance frontend applications using React, Next.js, JavaScript, and TypeScript.
• Develop a comprehensive design system, including reusable UI components, style guides, and clear documentation.
• Implement micro-frontend architecture for key e-commerce modules such as product display, checkout, and account management.
• Integrate with CMS platforms and personalization engines to deliver tailored user experiences.
• Optimize application performance, accessibility, and responsiveness across various devices and browsers.
• Set up and manage CI/CD pipelines using GitLab, GitHub Actions, or Jenkins.
• Deploy applications efficiently to AWS services, including Lambda and Amplify.
• Write and maintain unit, integration, and contract tests using Jest, React Testing Library, and Pact.
• Collaborate with cross-functional teams including UI/UX, QA, architecture, and product.
• Mentor junior developers and conduct thorough code reviews.
• Continuously improve the codebase by adhering to best practices and staying current with frontend trends.

• 5+ years of frontend development experience with strong expertise in React.js.
• Proficient in JavaScript, TypeScript, HTML, and CSS.
• Solid experience with Next.js for SSR and SSG.
• Knowledge of micro-frontend architectures and modular frontend design.
• Hands-on experience with design systems and building reusable UI components.
• Experience working with CI/CD pipelines and tools such as GitLab CI/CD, Jenkins, or GitHub Actions.
• Skilled in writing and maintaining tests with Jest, React Testing Library, and pact.io.
• Experience deploying to AWS Lambda, Amplify, and other serverless environments.
• Familiarity with monitoring and logging tools like NewRelic, Datadog, and ELK.
• Experience with headless CMS platforms (e.g., ContentStack) and digital experience platforms (e.g., Uniform).
• Integration experience with e-commerce platforms like CommerceTools.
• Strong understanding of state management, React hooks, and component lifecycles.
• Familiarity with GraphQL and RESTful APIs.
• Knowledge of accessibility (a11y) standards and best practices.
• Comfortable working in Agile/Scrum environments.
• AWS Certified Developer – Associate certification is a plus.

Working Conditions:

• Type of job: Temporary Contractor – 1 year with the possibility to extend
• Work hours: Monday - Friday, 40 hours per week
• Location: Toronto, ON