UI Developer
JSG (Johnson Service Group, Inc.)
About JSG (Johnson Service Group, Inc.)
UI Developer
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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