Top React Developer Jobs in Toronto

Design and implement responsive, accessible single-page applications using React. Collaborate with designers, analysts, testers and peers across project phases. Participate in reviews, contribute to deliverables, suggest UI improvements, debug and optimize front-end code, and use AI tools to accelerate development and testing.

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.

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.

The Senior React Developer will create full-stack web and mobile applications, optimize performance, collaborate with teams, and conduct code reviews. Requires over five years of experience in software development, focusing on React and Firebase.

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.

Design, build, and maintain cross-platform React Native mobile apps for Android and iOS. Integrate RESTful APIs, optimize performance, debug issues, collaborate with designers and backend teams, follow coding best practices, publish to app stores, and work within Agile/Scrum.

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.

Lead design and implementation of complex responsive React UIs, architect client-side state and data fetching, integrate AI into development and CI/CD, mentor engineers, enforce accessibility and performance, drive front-end roadmap, and troubleshoot production issues.

Design, build, and maintain scalable full‑stack applications using React, TypeScript, and NestJS. Translate business requirements into architecture and design, contribute to system and API design, support CI/CD and DevOps practices, integrate AI coding tools (Claude Code) and agentic workflows, establish prompt engineering standards, and define guardrails for AI‑generated code. Work on large‑scale, production‑grade distributed systems.

Develop and maintain cross-platform mobile applications using React Native, collaborating with designers and product managers to improve user experience and performance.

Design, develop, and maintain scalable React-based web applications; translate business requirements into technical solutions; support backend APIs and integrations as needed; provide Level 2/3 production support and root cause analysis; improve performance, reliability, CI/CD and automated testing; mentor junior developers and champion engineering best practices.

Lead design and development of cross-platform web and mobile UI tooling and React Native SDKs. Architect reusable components, optimize mobile performance, integrate REST/GraphQL backends, implement CI/CD and testing, mentor engineers, and collaborate with product and design to deliver high-quality cardholder experiences.

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

As a Senior Full Stack Developer, you'll design and deliver scalable Java and Angular or React applications, develop RESTful APIs, contribute to CI/CD practices, and collaborate with cross-functional teams to meet business needs.

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

The Java Full Stack Developer will design, develop, and maintain scalable web applications using Java and React, ensuring effective integration between front-end and back-end components while collaborating with UI/UX designers and participating in Agile teams.

Join Zensurance as an Intermediate Software Developer to build software for data collection and pricing engines using Node.js and TypeScript. Responsible for feature implementation, system performance monitoring, and mentoring junior developers while ensuring high-quality outputs.

The Senior Software Engineer will develop software by writing clean, efficient code, automate tasks, and collaborate with teams to enhance products, emphasizing TDD and API development.

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.

The Staff Mobile Engineer will lead the architecture and development of a new AI-focused mobile product, ensuring performance, offline capabilities, and mentoring the team. Responsibilities include optimizing AI/audio pipelines and delivering iterative improvements across the application.

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

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.

Join our team to build and maintain features in a cloud environment, requiring strong coding abilities and effective communication skills. Collaborate with peers to translate product requirements into engineering tasks and participate in support activities.

The Senior Full-Stack Developer will work closely with the co-founders to develop telehealth features, focusing on user-friendly software that's reliable and robust. They'll participate in code testing, deployment, and feature design within a collaborative office environment.