IT & Software

UI Developer

JSG (Johnson Service Group, Inc.)

Toronto · Ontario · Canada

Our client is seeking a UI Developer (React) to join their team, hybrid Toronto, 3 days per week.

Must Have

  • Strong experience with React.js and modern JavaScript (ES6+)
  • Hands‑on experience with React Hooks
  • Practical experience with React Query for data fetching and caching
  • Solid understanding of component lifecycle and rendering behavior
  • Proven experience with frontend performance optimization
  • Experience writing unit tests using tools such as Jest, React Testing Library, or similar
  • Strong knowledge of HTML5, CSS3, and responsive design
  • Familiarity with REST APIs and asynchronous programming
  • Working knowledge of web accessibility standards (WCAG)
  • Proficiency with Git and version control workflows

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Reference: WJ-3875_12315839

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