UI Developer
JSG (Johnson Service Group, Inc.) • toronto, on • Posted May 28, 2026
Position Overview
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
#J-18808-Ljbffr
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
#J-18808-Ljbffr