Senior React Developer to collaborate closely with product designers and back-end engineers to bring complex interfaces to life, establish front-end best p

Senior React Developer

Full Time/ Permanent

Location: Downtown Toronto, ON (4 days/week Onsite)

About the Role

We’re looking for a Senior React Developer who goes beyond writing code-you build exceptional user experiences. In this role, you’ll help shape the architecture, performance, and direction of modern front-end applications used at scale.

You’ll collaborate closely with product designers and back-end engineers to bring complex interfaces to life, establish front-end best practices, and mentor other developers.

What You’ll Do

• Design and develop scalable React applications using modern patterns and best practices
• Define and drive front-end architecture and technical standards
• Translate complex UI/UX designs into high-quality, production-ready code
• Optimize applications for performance, responsiveness, and accessibility
• Mentor and support junior and mid-level developers
• Collaborate cross-functionally to deliver high-quality features

What You Bring

Front-End Expertise

• Deep experience with JavaScript and modern front-end development
• Strong proficiency in React and its ecosystem
• Solid understanding of component architecture and composition

Architectural Thinking

• Ability to design scalable, maintainable front-end systems
• Strong grasp of performance techniques (e.g., memoization, lazy loading)
• Understanding of React internals, including rendering and reconciliation

Attention to Detail

• High standards for UI quality, consistency, and accessibility
• Ability to accurately translate design files into polished interfaces

State Management Experience

• Experience with state management libraries such as Redux, MobX, Zustand, or Context API
• Familiarity with Jotai is a plus (or willingness to learn quickly)

Performance Mindset

• Experience profiling and optimizing front-end performance
• Understanding of code-splitting, caching strategies, and load optimization
• Awareness of both perceived and actual performance considerations

Tech Stack

• React (Hooks, Context, Suspense)
• TypeScript (preferred)
• State management (Jotai preferred)
• Build tools (Vite, Webpack, ESBuild)
• Testing (Jest, React Testing Library)
• Modern CSS solutions (CSS-in-JS or frameworks)
• Git and CI/CD pipelines