Top Front End Developer Jobs in Toronto

Lead frontend architecture and product development for member-facing web and mobile apps. Build high-performance, accessible React/React Native UIs, own end-to-end features including APIs and backend services, mentor engineers, drive design system and frontend standards, and collaborate with Product, Design, Clinical, and Data teams to deliver scalable, user-centered health experiences.

Join an early-stage B2B enterprise AI startup as a frontend or frontend-leaning fullstack engineer. Build user-facing products and standalone UI component libraries using React, TypeScript, and Next.js. Design and architect frontend features from scratch, handle fullstack responsibilities as needed, solve challenging technical problems, and contribute as a core member of the growing team in a hybrid Palo Alto office.

Join Betr as a Senior Frontend Engineer to develop mobile applications using React Native and TypeScript, focusing on sportsbooks and gaming products, while optimizing performance and handling real-time data.

The Senior Software Engineer will enhance the platform through collaboration, technical leadership, and by developing high-quality frontend components, ensuring best practices and performance.

The Senior Software Engineer will develop AI/ML features, build robust APIs, create user-friendly UIs, and integrate AI models into ClickHouse Cloud.

Build and maintain responsive, accessible React frontends from Figma designs; create reusable components and Storybook docs; implement client and server state management; integrate wallet and blockchain interactions; write unit, integration, and E2E tests; monitor and debug production with Sentry; participate in architecture, estimation, code review, and CI/CD workflows.

The Frontend Engineer will build web interfaces for a healthcare APIs clearinghouse while collaborating across teams to ensure high-quality, responsive design and functionality.

Design and build responsive, high-performance front-end interfaces for AI-driven finance workflows. Translate complex data into clear visualizations, balance automation with human control, collaborate with backend and AI teams, and own frontend architecture and design system standards.

Build scalable, accessible frontend components and UX for an AI-native data platform using React and Next.js. Implement dashboards, agent interfaces, and multi-tenant admin panels; integrate real-time and streaming data, APIs, and visualize high-dimensional data. Contribute to component libraries, design systems, and ship production-ready, responsive features.

Senior front-end engineer responsible for developing products end-to-end, owning projects from concept through launch, and shaping company direction to drive growth across portfolio companies.

As a Senior Frontend Engineer, you'll develop UI features for the AI voice platform, working with React and TypeScript while collaborating on backend systems and leading projects from concept to launch.

Develop and maintain Ubegos frontend products: mobile/web quest experiences, user and creator dashboards, admin panel, marketing features, and third-party integrations. Work in one-week Scrum sprints, perform code reviews, contribute to software architecture, and use modern frontend frameworks, relational databases, and AI-assisted coding tools.