Job Title: Front-End (React) Lead Developer

Location :: Canada

Required Technical Skills

React.js and JavaScript

- Strong hands-on experience with React.js, functional components, and React Hooks.
- Excellent knowledge of JavaScript ES6+ and TypeScript.
- Understanding of component lifecycle, reconciliation, rendering behavior, and React internals.
- Experience building reusable components, custom hooks, and shared UI libraries.
- Knowledge of routing using React Router or equivalent libraries.

State Management

- Experience with Redux Toolkit, Redux, Context API, Zustand, or similar solutions.
- Understanding of state normalization, asynchronous actions, and API data caching.
- Experience managing complex application state and data flows.

UI Development

- Strong knowledge of HTML5, CSS3, Flexbox, Grid, and responsive web design.
- Experience with CSS Modules, Sass, Tailwind CSS, Material UI, or similar UI frameworks.
- Understanding of accessibility standards, semantic HTML, and WCAG guidelines.
- Ability to translate Figma or other design mockups into production-ready interfaces.

API Integration and Security

- Experience integrating REST APIs and handling asynchronous requests.
- Knowledge of HTTP, JSON, error handling, and API authentication.
- Understanding of OAuth 2.0, OpenID Connect, and JWT-based authentication.
- Awareness of frontend security risks such as XSS and CSRF.

Testing and Code Quality

- Experience with Jest, React Testing Library, Vitest, or Cypress.
- Knowledge of unit, integration, component, and end-to-end testing.
- Experience with ESLint, Prettier, SonarQube, and code-quality standards.

Performance and Build Tools

- Experience with Vite, Webpack, npm, or Yarn.
- Knowledge of code splitting, lazy loading, memoization, and bundle analysis.
- Experience profiling and optimizing frontend performance using browser developer tools.
- Understanding of Core Web Vitals and browser rendering performance.





DevOps and Deployment

- Experience with Git and pull-request workflows.
- Knowledge of CI/CD pipelines using Jenkins, GitHub Actions, GitLab CI, or similar tools.
- Exposure to Docker, cloud platforms, and frontend deployment environments.

Technical Leadership Responsibilities

- Lead frontend architecture and make technical decisions aligned with business requirements.
- Conduct design reviews, code reviews, and technical assessments.
- Break down requirements into technical tasks and provide effort estimates.
- Mentor team members and establish coding standards.
- Identify technical debt and drive refactoring and modernization initiatives.
- Coordinate with backend, QA, DevOps, and product teams to ensure successful delivery.
- Take ownership of release quality, production stability, and frontend technical excellence.

Preferred Qualifications

- Bachelor's or Master's degree in Computer Science, IT, or a related field.
- Experience building enterprise-scale React applications.
- Experience with Next.js, server-side rendering, or static site generation.
- Knowledge of micro-frontends and frontend monorepo architecture.
- Experience developing design systems and shared component libraries.
- Exposure to GraphQL, WebSockets, and real-time applications.
- Experience with Agile/Scrum methodologies and distributed development teams.

Key Deliverables

- Scalable and maintainable frontend architecture.
- High-quality, reusable React components.
- Improved page load times and application responsiveness.
- Solid test coverage and reduced production defects.
- Consistent UI/UX and accessibility compliance.
- Timely delivery of frontend releases.
- Effective mentoring and technical leadership.

Core Skills React.js | JavaScript ES6+ | TypeScript | Redux Toolkit | HTML5 | CSS3 | REST APIs | React Hooks | Responsive Design | Jest | React Testing Library | Vite/Webpack | Frontend Architecture | Performance Optimization | Technical Leadership

📌 Frontend React DEVELOPER || Canada (Toronto)
🏢 TestingXperts
📍 Toronto