UI Developer

Title: UI Developer

Work location: Toronto, Canada(Hybrid)

Duration: 12+ Months Contract

Job Description:

About the Role

We are looking for a
Senior React Web App Engineer
to drive the technical execution and team leadership of our next-generation frontend platforms. You will lead the development of reusable React components and frameworks, oversee the rollout of shared UI systems using
ShadCN
, and guide engineers in implementing scalable, performant web applications.

This role is ideal for someone who thrives at the intersection of hands-on coding, mentorship, and driving execution across multiple teams.

Key Responsibilities

• Lead Frontend Development
  : Guide the hands-on development of React applications and shared component libraries with a focus on reusability, maintainability, and developer efficiency.
• ShadCN Ownership
  : Own and extend our
  ShadCN-based component library
  , aligning closely with design and product teams to deliver consistent and accessible UI patterns.
• Drive Execution
  : Collaborate with engineers across pods to ensure timely delivery of frontend projects, maintain code quality, and standardize patterns across applications.
• Champion Best Practices
  : Promote performance optimization, accessibility (WAI-ARIA compliance) - ShadCN follows WAI-ARIA pattern and secure coding standards in all aspects of frontend development.
• Collaborate Cross-Functionally
  : Work with designers, backend developers, product managers, and platform teams to align implementation with product strategy and technical architecture.

Required Qualifications

• 5+ years of professional experience developing large-scale web applications
  , including architecting and delivering high-traffic, complex SPAs.
• 5+ years experience in frontend development with a strong focus on
  React
  and
  TypeScript
  .
• Deep hands-on experience building and leading projects with
  ShadCN
  .
• Fullstack experience
  and
  Claude Code , Cursor
  AI vibe coding
• Strong knowledge of
  SOLID principles
  , object-oriented and functional design patterns, and clean architecture approaches.
• Track record of building scalable SPAs and modular component systems in production.
• Strong knowledge of frontend performance tuning, testing strategies (Jest, Playwright), and developer tooling (Vite, TurboRepo, ESLint, Storybook).
• Demonstrated ability to lead teams through complex frontend initiatives and architectural transitions.
• Experience with state management (Redux, Zustand, or others) and modern UI patterns (Provider, Composite, Summary, etc.).
• Experience with data fetching mechanisms (restful API, GraphQL, WebSockets,gRPC) and related libraries (Axios, TanStack Query, Apollo, SocketIO, etc.)
• Experience with different styling patterns/framework (CSS modules, SCSS, CSS-in-JS, Tailwind, etc.)
• Proficient in accessibility standards and responsive UI development.

Preferred Qualifications

• Familiarity with
  dynamic/meta-driven UI
  or internal app frameworks.
• Strong eye for design consistency and user experience quality.
• Contributions to open-source projects or frontend communities, especially around React or design systems.
• Background working in a platform or internal tools team is a plus.