Top React Developer Jobs in Toronto

Design, develop, and maintain scalable React-based web applications, contributing to front-end and back-end development, APIs, integrations, testing, documentation, and production support. Translate business needs into technical solutions, improve application performance and reliability, and mentor junior developers. Collaborate with cross-functional teams across Canada and internationally while promoting engineering best practices, CI/CD, automated testing, and code quality.

Senior Software Engineer responsible for developing and maintaining web applications and microservices (React, Golang). Mentor team members, lead code reviews, influence technical decisions, improve CI/CD and testing strategies (unit, E2E, performance), collaborate across teams on integrations, and promote engineering best practices and documentation.

Lead modernization of TD's Jira/JSM platforms and build enterprise applications using Java, React, and Spring. Drive Atlassian Cloud migration, design secure integrations (OAuth/LDAP/REST), maintain ScriptRunner customizations, contribute to CI/CD pipelines, and support high-availability production systems. Provide technical leadership, mentor developers, and ensure compliance with change management and operational standards.

Lead design and development of scalable, cloud-native financial and reconciliation systems on GCP. Own architecture, drive technical decisions, mentor engineers, embed AI and automation, collaborate with product and QA, and ensure reliability, performance, and test automation.

Build and scale consumer-facing frontend experiences for patient sign-up, care flows, and account management across web and mobile platforms. Own frontend architecture and feature development from concept through production, ensure cross-browser and device compatibility, write clean and well-tested React code, and collaborate on feature design, architecture, and delivery in an on-site product and engineering environment.

Design and deliver scalable full-stack applications using Java, Spring Boot, Angular, React, and Next.js. Build secure REST APIs, responsive accessible interfaces, and maintainable tested code. Collaborate with product, design, platform, and engineering teams on end-to-end features. Contribute to architecture, code reviews, CI/CD, cloud-native deployment, automated testing, and continuous process improvement while owning delivery risks and technical trade-offs.

As a React Engineer, you will build responsive user interfaces and collaborate with cross-functional teams to enhance the user experience through performance optimization, integration with APIs, and adhering to accessibility standards.

Develop and maintain mobile applications using React Native, collaborate with cross-functional teams, and optimize applications for performance and user experience.

As a React Engineer, you'll build responsive user interfaces for web applications, optimizing performance and integrating with APIs while ensuring accessibility and SEO best practices.

Lead design, implement, and maintain a scalable SaaS insurance platform across front-end and back-end. Provide technical direction, mentor developers, enforce best practices, optimize performance, ensure security and compliance, and drive adoption of modern architectures and testing methodologies.

The Java Full Stack Developer will develop backend services, design Microservices, and build responsive UIs with React.js, ensuring integration and performance optimization.

Lead the development of cloud-native enterprise applications using React and AWS, mentor team members, collaborate with stakeholders, and optimize solutions.

The React Full Stack Developer will design, develop and maintain web applications, leveraging expertise in Java and JavaScript frameworks, specifically React, along with deep knowledge of cloud-native application development and microservices architectures.

Design, implement, and maintain backend services and web applications on a Microsoft stack; build front-end features with React; write well-tested, secure code; collaborate with product and design; participate in code reviews and improve CI/CD/DevSecOps pipelines.

The Senior Full Stack Developer will build features for a data security platform, focusing on microservices, code quality, and security best practices while leveraging AI tools for development efficiency.

Join a cross-functional team to develop data products, write efficient code, influence AI roadmap, and collaborate with diverse professionals.

The role involves designing and developing front-end and back-end components, mentoring team members, ensuring system efficiency, and optimizing platform performance in a collaborative team environment.

Lead design, development, and maintenance of high-performance React Native mobile apps for iOS and Android. Build shared UI components, collaborate with backend/product/design teams, mentor engineers, optimize performance, and research new technologies to deliver scalable, production-grade mobile experiences.

The Senior React Native Developer will design, build, and ship cross-platform mobile apps, ensuring high performance and reliability while collaborating with various teams.

Lead development of cross-platform mobile applications using React Native, integrating APIs and hardware. Collaborate with teams and optimize performance across platforms.

Design and implement frontend applications using JS, CSS, React, and Flutter. Collaborate on technical specs and contribute to documentation, ensuring user experience and performance.

The Mobile Developer (React Native) will build high-quality cross-platform mobile applications, participate in testing, and collaborate with the development team.

Develop and improve a SaaS platform by designing, developing, and deploying scalable full-stack features. Responsibilities include contributing to architecture and technical decisions, ensuring application quality and security, participating in Agile planning and estimation, conducting code reviews, improving CI/CD practices, and using AI tools to enhance development productivity. The role requires collaboration, technical problem-solving, and continuous learning in a fully remote environment.

Develop and deploy features for a SaaS platform using full-stack development practices. Responsibilities include architectural contributions, application quality and security, Agile sprint participation, code reviews, CI/CD improvement, collaboration, and use of AI tools to enhance development productivity. The role requires Node.js and React expertise, software development experience, Git proficiency, and bilingual French-English communication.

Build the new ShareGate Migrate web app as a senior full-stack developer using React, TypeScript, and C#/.NET. Ship full-stack features, shape technical choices, integrate Microsoft APIs (Graph, Azure AD/Entra ID, MSAL), mentor teammates, anticipate risks, and use AI-assisted development tools to accelerate delivery and quality.