Top React Developer Jobs in Toronto

Develop and maintain life insurance calculation capabilities and full-stack applications using C#, .NET, F#, React, APIs, microservices, and Azure Kubernetes Service. Responsibilities include designing secure solutions, automated testing, CI/CD, production troubleshooting, code reviews, technical documentation, and collaboration with cross-functional Agile teams. The role also involves refactoring applications, supporting distributed architectures, and translating complex insurance business logic into reliable software.

Design, develop, deploy, and support scalable full-stack enterprise applications using Java, Spring Boot, React, Node.js, Python, SQL, microservices, APIs, and cloud platforms. Responsibilities include solution design, database optimization, CI/CD, automated testing, security, troubleshooting, technical documentation, and collaboration with product, architecture, QA, DevOps, and business teams. The hybrid role requires two days weekly in a Toronto office.

Build and maintain secure, high-performance mobile applications for digital asset users across iOS and Android. Own features from design through release, integrate RESTful APIs, manage offline state and caching, implement comprehensive testing, debug issues, and monitor post-launch performance. Collaborate onsite in Toronto while applying mobile security practices and supporting cryptocurrency-related products.

Build and scale cloud-native platform services supporting healthcare workflows. Responsibilities include architectural decision-making, distributed systems development, REST APIs and microservices, reliability and performance ownership, collaboration with product and clinical teams, mentoring, automated testing, observability, incident response, and on-call support.

Develop and maintain full-stack enterprise applications using Java, React, Spring Boot, Oracle, REST, GraphQL, and microservices. Collaborate within Agile teams to design solutions, write and test code, troubleshoot complex issues, improve processes, and contribute to architecture and technical standards. Use Docker, Kubernetes, CI/CD pipelines, cloud-native practices, and AI development tools such as GitHub Copilot. Partner with stakeholders and manage delivery risks across the software development lifecycle.

Build and own full-stack product features using React, TypeScript, Node.js, and Java. Develop scalable user interfaces, backend services, REST APIs, and PostgreSQL solutions for financial risk applications. Lead technical design reviews, make architectural decisions, improve testing and CI/CD practices, and support secure, observable production systems. Collaborate with product and risk teams, mentor engineers, and apply AI-enabled development tools. The role follows a hybrid schedule with two days per week in the Toronto office.

Develop and maintain front-end web applications for Simplii Financial, including online banking services, forms, calculators, and financial planning tools. Define front-end architecture using React.js and Vue.js, collaborate with UX, QA, business, and product teams, improve development practices, document technical solutions, and ensure accessibility, security, quality, and delivery standards.

Build and maintain full-stack business applications across the software development lifecycle. Develop responsive React front ends and integrate APIs, databases, and server-side services using Node.js and Express. Create automated tests, support CI/CD and DevSecOps practices, improve performance, troubleshoot defects, and implement WCAG 2.1 accessibility. Collaborate with product, design, business, and technology stakeholders, contribute to technical discussions and documentation, and mentor other engineers.

Develop and maintain full-stack applications using Java, Spring Boot, microservices, React, Redux, JavaScript, and TypeScript. Build RESTful APIs, work with SQL and NoSQL databases, write unit and integration tests, manage code with Git, and collaborate within Agile Scrum or Kanban teams. This is a full-time onsite position in Mississauga, Canada, requiring 9+ years of experience.

Develop scalable cloud-native backend services, REST APIs, microservices, and responsive React applications using Go. Integrate enterprise systems and third-party APIs, support distributed architectures, and contribute to testing, CI/CD, deployments, monitoring, troubleshooting, security, and performance optimization. Collaborate with product, architecture, security, and engineering teams to deliver reliable end-to-end solutions.

Develop and deliver enterprise CRM, customer service, case management, and compliance solutions using Dynamics 365, Power Platform, Azure, and Dataverse. Design data models, integrations, APIs, and cloud architectures while developing with Java, React, .NET/C#, JavaScript/TypeScript, SQL Server, and REST APIs. Implement CI/CD pipelines, automated deployments, and source control using Azure DevOps and GitHub. This is a fully onsite contract role in Toronto through March 2027.

Develop scalable Go backend services, REST APIs, microservices, and React web applications for cloud-native and conversational AI solutions. Integrate systems and APIs, support distributed architectures, write tested and maintainable code, contribute to CI/CD and deployments, troubleshoot production issues, optimize performance, and collaborate with product, architecture, security, and engineering teams.

Develop end-to-end cloud-native applications across frontend, backend, APIs, AI, and data layers. Build React interfaces, Python and Java services, LLM and agentic AI solutions, RAG systems, data pipelines, and Azure-based infrastructure. Responsibilities include testing, deployment automation, security, observability, troubleshooting, architecture, and cross-functional collaboration.

Build and operate customer-facing SaaS applications using Java, Spring, React, and TypeScript. Own complex features from design through production support, develop APIs and distributed systems, improve frontend experiences, apply AI-assisted coding tools, modernize legacy software, strengthen CI/CD and observability, and mentor engineers through technical leadership and code reviews.

Leads the design, development, maintenance, and technical direction of a scalable insurance SaaS platform. Works across .NET back-end and Vue/React front-end technologies, optimizes performance, enforces coding and security standards, leads code reviews, resolves bugs, and mentors developers. Collaborates with product, design, and engineering teams on architecture, requirements, testing, cloud infrastructure, microservices, and continuous platform improvement.

Leads delivery of complex React Native screens and integrations across multiple waves. Establishes engineering patterns, reference implementations, code standards, and architecture decisions; reviews pull requests and mentors client engineers. Owns payment, Auth0 identity, push notification, deep-linking, and native platform integrations. Supports hypercare self-sufficiency exercises and must have production experience with React Native New Architecture, mobile replatforming, secure token storage, and iOS and Android development.

Develop scalable Java Spring Boot APIs, microservices, React-based interfaces, ETL pipelines, and SQL data solutions. Deploy workloads on AWS, optimize performance, implement monitoring and automation, and collaborate with product, frontend, data, and DevOps teams. The role also contributes to architecture, accessibility, reliability, and data-driven product improvements.

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.

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 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.