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Added 2 days ago
K
Javascript Developer
Kelly
Toronto, ON
- Contract
Job Title: Senior React / JavaScript Developer
Added 2 days ago
P
Software Developer
Plusgrade
Montreal, QC
- Full-time
…Airways, Finnair to name a few. We’re looking for a fullstack developer to own meaningful capabilities in that product end to end, from the proposal to…
Added 2 days ago
K
Software Engineer
Kelly
Mississauga, ON
- Contract
Working knowledge of HTML, CSS, JavaScript, and React/Angular.
Added 2 days ago
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React.js Engineer Toronto Canada/ Hybrid
Damcosoft
Toronto, ON
- Contract
Experience with React Hooks, functional components, and component lifecycle concepts.
Added 2 days ago
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Frontend React DEVELOPER || Canada
TestingXperts
Toronto, ON
- Contract
Strong hands-on experience with React.js, functional components, and React Hooks.
Added 2 days ago
S
Software Engineer (Unpaid)
Spawn
Canada
- Temporary
…Swift/SwiftUI or other similar frontend technologies such as React/React Native, backend development in Java Spring Boot or similar API development, plus, fundamental knowledge of SQL…
Added 2 days ago
Software Engineer 3, Identity and Access Management
MongoDB
Toronto, ON
…workloads, embrace innovation, and unleash AI. Our industry-leading developer data platform, MongoDB Atlas, is the only globally distributed, multi-cloud database and is available in more…
Added 2 days ago
S
Senior Software Engineering Manager
symplistic.ai
Woodbridge, ON
- $150,000 CAD / year
- Full-time
Build Python/React applications, backend services, APIs, and enterprise integrations.
Added 2 days ago
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Java Developer
Dexian
Mississauga, ON
- Other
Build and enhance user-facing features in Angular (or React) to deliver complete, usable solutions
Added 2 days ago
SI
Senior Software Developer
Staples Inc.
Richmond Hill, ON
- Full-time
We are seeking a highly skilled Senior Software Developer to join our dynamic team. The ideal candidate will have extensive experience in C#, .NET, Web Services, WCF, Web API, Microsoft…
Added 2 days ago
AS
UI/UX Engineer
Axelon Services Corporation
Toronto, ON
- $74 to $78 USD / hour
- Contract
Proficiency in HTML5/JavaScript (React, Node.js) and knowledge of standard web development concepts.
Added 2 days ago
HR
Senior Software Engineer – Drone Control & Simulation (Defense and Dual-Use)
Haply Robotics
Montreal, QC
- Full-time
We’re looking for a Senior Software Engineer to be the first dedicated developer behind how operators fly, train, and feel drones through haptics.
Added 2 days ago
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BlackBerry Radar- Senior Full Stack Developer
BlackBerry
Ottawa, ON
- Full-time
Contribute to front-end development using React
Added 2 days ago
BQ
BlackBerry Radar- Senior Full Stack Developer
BlackBerry QNX
Ottawa, ON
- Full-time
Contribute to front-end development using React
Added 2 days ago
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Senior Full Stack Developer (Java/React)
Miratech
Toronto, ON
- Full-time
We are looking for a Senior Full Stack Developer to design, build and maintain both front-end interfaces and back-end systems, including APIs, microservices, databases and cloud…
Added 2 days ago
MP
U SPORTS Winter Intern
M2 Partners
Toronto, ON
- Full-time
Added 2 days ago
Unified Customer Experience - Consultant - Senior Full Stack Engineer
Questrade Financial Group
Calgary, AB
…across Questrade's products, spanning front-end applications (React Native, ReactJS) and back-end services (NodeJS, APIs, distributed systems). This role is intentionally platform-flexible:…
Added 2 days ago
LH
2600001909 - Sr. Digital Solutions Developer
Lakeridge Health
Whitby, ON
- Internship
The Senior Digital Solutions Developer is responsible for the design, development, implementation, governance, and optimization of enterprise digital solutions that support organizational…
Added 2 days ago
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Senior Full Stack Developer
Affinity
BC · British Columbia, Canada
- Contract
Minimum five years’ related experience* as a Full Stack Developer
Added 2 days ago
RD
Full Stack Engineer
Randstad Digital
Toronto, ON
- Contract
Added 2 days ago
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News Editor/Presenter (English Services) (On-Site)
CBC/Radio-Canada
St. John's, NL · Greater St. John's Metropolitan Area
- Full-time
Strong news judgment and a demonstrated ability to react quickly to breaking news and changing priorities, and chase multiple stories at once.
Added 2 days ago
IC
Intermediate SharePoint Developer
ITS Consulting Inc
Vancouver, BC
- $100,000 to $120,000 CAD / year
- Full-time
We’re looking for an Intermediate SharePoint Developer with strong hands-on development experience who enjoys solving business problems and working directly with clients.
Added 2 days ago
MM
Sr Java / Dev Ops
Mitchell Martin Inc.
Mississauga, ON
- $73 to $78 CAD / hour
- Other
Join a dynamic team in a hybrid role focused on enhancing developer productivity. This contract position involves designing, developing, and deploying cutting-edge internal tools and…
Added 2 days ago
MM
Senior Forward Deployed Engineer
Mitchell Martin Inc.
Mississauga, ON
- $62 to $67 CAD / hour
- Other
Java | Python | Spring Boot | Microservices | REST APIs | FastAPI | Flask | Docker | Kubernetes | Jenkins | Oracle Database | SQL Server | MongoDB | React | Angular
Added 2 days ago
AS
Application Development
Axelon Services Corporation
Montreal, QC
- $77.93 USD / hour
- Other
Experience with UI development frameworks (preferably Angular, React, etc.).

TestingXperts

Frontend React DEVELOPER || Canada

Toronto, ON, Canada

Contract

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Job details

Job type: Contract
Apply by: Nov 26, 2026
Posting language: English
Posted: Oct 27, 2026

Original job description

Job Title: Front-End (React) Lead Developer

Location :: Canada

Required Technical Skills

React.js and JavaScript

Strong hands-on experience with React.js, functional components, and React Hooks.
Excellent knowledge of JavaScript ES6+ and TypeScript.
Understanding of component lifecycle, reconciliation, rendering behavior, and React internals.
Experience building reusable components, custom hooks, and shared UI libraries.
Knowledge of routing using React Router or equivalent libraries.

State Management

Experience with Redux Toolkit, Redux, Context API, Zustand, or similar solutions.
Understanding of state normalization, asynchronous actions, and API data caching.
Experience managing complex application state and data flows.

UI Development

Strong knowledge of HTML5, CSS3, Flexbox, Grid, and responsive web design.
Experience with CSS Modules, Sass, Tailwind CSS, Material UI, or similar UI frameworks.
Understanding of accessibility standards, semantic HTML, and WCAG guidelines.
Ability to translate Figma or other design mockups into production-ready interfaces.

API Integration and Security

Experience integrating REST APIs and handling asynchronous requests.
Knowledge of HTTP, JSON, error handling, and API authentication.
Understanding of OAuth 2.0, OpenID Connect, and JWT-based authentication.
Awareness of frontend security risks such as XSS and CSRF.

Testing and Code Quality

Experience with Jest, React Testing Library, Vitest, or Cypress.
Knowledge of unit, integration, component, and end-to-end testing.
Experience with ESLint, Prettier, SonarQube, and code-quality standards.

Performance and Build Tools

Experience with Vite, Webpack, npm, or Yarn.
Knowledge of code splitting, lazy loading, memoization, and bundle analysis.
Experience profiling and optimizing frontend performance using browser developer tools.
Understanding of Core Web Vitals and browser rendering performance.

DevOps and Deployment

Experience with Git and pull-request workflows.
Knowledge of CI/CD pipelines using Jenkins, GitHub Actions, GitLab CI, or similar tools.
Exposure to Docker, cloud platforms, and frontend deployment environments.

Technical Leadership Responsibilities

Lead frontend architecture and make technical decisions aligned with business requirements.
Conduct design reviews, code reviews, and technical assessments.
Break down requirements into technical tasks and provide effort estimates.
Mentor team members and establish coding standards.
Identify technical debt and drive refactoring and modernization initiatives.
Coordinate with backend, QA, DevOps, and product teams to ensure successful delivery.
Take ownership of release quality, production stability, and frontend technical excellence.

Preferred Qualifications

Bachelor's or Master's degree in Computer Science, IT, or a related field.
Experience building enterprise-scale React applications.
Experience with Next.js, server-side rendering, or static site generation.
Knowledge of micro-frontends and frontend monorepo architecture.
Experience developing design systems and shared component libraries.
Exposure to GraphQL, WebSockets, and real-time applications.
Experience with Agile/Scrum methodologies and distributed development teams.

Key Deliverables

Scalable and maintainable frontend architecture.
High-quality, reusable React components.
Improved page load times and application responsiveness.
Strong test coverage and reduced production defects.
Consistent UI/UX and accessibility compliance.
Timely delivery of frontend releases.
Effective mentoring and technical leadership.

Core Skills

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More about this job

Responsibilities

Lead frontend architecture and technical decisions, review designs and code, estimate and break down work, and mentor team members. Coordinate with backend, QA, DevOps, and product teams to deliver reliable releases, improve performance and quality, and maintain frontend standards.

Requirements

Requires strong hands-on experience with React.js, JavaScript ES6+, TypeScript, state management, responsive UI development, API integration, testing, and frontend performance optimization. The role also calls for technical leadership, code review and mentoring experience; a bachelor's or master's degree in a related field and enterprise React experience are preferred.

Skills

React.js
JavaScript ES6+
TypeScript
Redux Toolkit
HTML5
CSS3
REST APIs
React Hooks
Responsive Design
Jest
React Testing Library
Vite
Webpack
Frontend Architecture
Performance Optimization
Technical Leadership

Visa sponsorship

Not detected in the job text

Keywords

React.js
JavaScript ES6+
TypeScript
React Hooks
Redux Toolkit
Redux
Context API
Zustand
HTML5
CSS3
Flexbox
CSS Grid
Responsive Web Design
REST APIs
OAuth 2.0
OpenID Connect
JWT
Jest
React Testing Library
Vitest
Cypress
Vite
Webpack
CI/CD
Docker
Next.js
Server-Side Rendering
Micro-Frontends
GraphQL
Agile/Scrum

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