Top Front End Developer Jobs in Toronto

Design, build, and maintain customer-facing React frontend systems for search, catalog navigation, data lineage, dashboards, and AI-assisted analysis. Improve performance across large trees, tables, and streaming interfaces; shape product and UX decisions with design and product partners; raise engineering quality through reviews, documentation, complex bug resolution, and mentorship.

Develops and supports full-stack technical solutions for Global Transaction Banking, with a frontend focus on React. Responsibilities include designing and integrating systems, defining technical requirements, building and maintaining infrastructure, ensuring security and quality standards, supporting project delivery, resolving incidents, and advising business and project teams. The role serves as a subject matter expert, works independently on complex problems, and coaches less-experienced colleagues.

Build and improve reliable, scalable frontend experiences for Affirm’s pre-checkout products, including Affirm.js, promotional messaging, experimentation, and developer-facing tooling. Use browser debugging, monitoring, metrics, and testing tools to maintain accessible, performant cross-browser experiences. Collaborate with engineers and stakeholders, contribute to code reviews, troubleshoot operational issues, and write clear, well-tested, extensible code.

Build and maintain performant, accessible, SEO-focused web applications using Shopify and Hydrogen. Lead frontend architecture, refactor systems, improve code quality, and develop AI-assisted workflows and customer-facing AI features. Collaborate with design, product, and backend teams, while mentoring developers and contributing to testing, planning, code reviews, and retrospectives.

Own and deliver high-availability authentication, verification, and fraud experiences across web, backend, and mobile interfaces. Lead quarterly goals, technical planning, system delivery, code quality, operational availability, and on-call support. Collaborate with product, design, and analytics stakeholders, resolve complex technical and business issues, mentor engineers, and promote engineering standards. The role requires expertise in React or Vue, JavaScript or TypeScript, large codebases, scalable architecture, and effective communication.

Design and deliver complex digital SoCs for automotive communication systems, covering microarchitecture, RTL, verification, synthesis, lint, CDC, LEC, and static timing analysis. Collaborate with architects, software, hardware, and verification teams to define specifications, data flows, algorithms, interfaces, and resource management while meeting power, performance, and area targets. The role requires advanced ASIC design expertise, strong digital fundamentals, and experience with networking protocols or related semiconductor technologies.

Owns Angular frontend features from design through delivery, including architecture, development, testing, performance, accessibility, and defect resolution. Leads code reviews, mentors developers, collaborates with cross-functional Agile teams, and contributes to engineering standards, tooling, documentation, and scalable application delivery.

Own and evolve Euna Solutions’ web presence through hands-on front-end development, web operations, landing page creation, and a WordPress-to-Next.js/headless CMS migration. Manage performance, SEO, accessibility, hosting, DNS, CDN configuration, analytics, consent management, and conversion optimization. Use AI development tools extensively, collaborate with marketing stakeholders, and maintain a prioritized web improvement backlog.

Own end-to-end frontend development for high-stakes trading experiences, including order entry, execution, options, real-time market data, and portfolios. Design reliable, performant client-facing systems, partner with Product and Design, make architectural decisions, use AI-assisted workflows, and mentor engineers through reviews, documentation, pairing, and technical leadership.

Develop and lead complex frontend projects using TypeScript and React, improve code quality and workflows, write automated tests, optimize performance, conduct code reviews, and mentor junior engineers. Collaborate with QA and engineering teams, influence technical decisions, integrate APIs and microservices, and promote engineering excellence through modern development practices and continuous improvement.

Develop and maintain scalable React features for The Weather Network’s web and mobile platforms. Build real-time community functionality, premium user experiences, responsive interfaces, and interactive animations. Translate product requirements into technical solutions, integrate APIs and third-party services, optimize performance and accessibility, write unit tests, support CI/CD pipelines, and collaborate with Product Managers, Tech Leads, and QA teams.

Develop and improve front-end ASIC/SoC build methodologies, CAD flows, and automation from RTL development through implementation handoff. Build production-quality infrastructure for RTL quality, verification, IP management, regression, and release readiness. Collaborate with engineering teams and EDA vendors to resolve bottlenecks, evaluate AI and automation technologies, and drive methodology adoption across projects.

Develop and maintain user-facing web applications using Next.js, optimize performance and scalability, implement responsive interfaces, and ensure UI/UX designs are technically feasible. Collaborate with backend developers and designers, write clean documented code, troubleshoot issues, and conduct performance testing. The role requires strong autonomy, communication, and effective remote collaboration.

Build and optimize high-performance marketing websites across Next.js, React, Sanity, WordPress, PHP, and Twig. Lead A/B and multivariate experimentation, CRO infrastructure, accessibility, SEO, component libraries, and AI-assisted development workflows. Set technical standards, mentor developers, collaborate with CRO, analytics, design, and marketing teams, and improve experimentation velocity, statistical integrity, site performance, and AI-search readiness.

Leads the architecture and development of scalable frontend software for Okta’s AI agent access policy platform. Responsibilities include designing and shipping production-grade React and Express applications, testing, monitoring, code reviews, technical debt reduction, cross-functional collaboration, and mentoring. The role focuses on secure, high-performance user interfaces and identity-aware access management features for enterprise customers.

Build and improve modern React-based web applications for restaurant customers. Develop data-rich guest relationship tools, collaborate with product, design, backend engineering, and delivery teams, and drive projects from technical planning through release. Apply testing, accessibility, scalability, observability, and AI-assisted development practices to deliver high-quality user experiences.

Build performant, accessible, responsive websites and custom WordPress themes, Gutenberg blocks, and plugins from design mockups. Develop frontend interfaces using HTML, CSS/SASS, and JavaScript while troubleshooting and extending PHP, WordPress, and Drupal codebases. Collaborate with designers, consultants, and clients to refine implementations, diagnose CMS issues, and use AI tools to support project execution.

Lead KEV’s frontend architecture and technical strategy, designing scalable design systems and micro frontend patterns. Provide hands-on React expertise across state management, build tooling, testing, and performance. Guide architecture decisions, document trade-offs, mentor frontend engineers, evaluate AI coding tools, and partner with tech leads to align frontend delivery with broader platform goals.

Build and maintain features across a real-time AI-generated React application and a mature React analytics platform. Responsibilities include component systems, streaming UI contracts, multi-tenant theming, customer embeds, accessibility, testing, performance, data visualization, and API collaboration. The role requires independent ownership, clear technical writing, mentoring, and effective work across established and greenfield codebases.

Implement and ship approved UX improvements for Firefox screen, window, and tab sharing. Build accessible, tested, and localizable browser UI in a large codebase; collaborate with UX and QA, support testing with web conferencing services, and contribute through public code review. The role requires production front-end experience with JavaScript, HTML, and CSS, automated UI testing, rapid onboarding to mature codebases, and effective asynchronous communication.

Develop and maintain Django-based manufacturing applications, owning frontend interfaces and delivering features across the full stack. Build JavaScript interfaces, REST integrations, live dashboards with Django Channels, and reliable production workflows. Refactor legacy code, improve testing, document processes, train shop-floor users, gather requirements, and support safe software rollouts across departments. Regular production-floor presence is required, along with sound use of AI-assisted development tools.

As a Product Engineer at Bree, you will build full-stack features using a TypeScript/Node serverless stack and React Native, focusing on delivering value quickly and iteratively. You’ll collaborate closely with design and product teams to enhance customer outcomes while managing engineering tradeoffs effectively.

Lead frontend engineering for Affirm’s consumer web experiences using React and TypeScript. Own quarterly team goals, deliver major product features, modernize web architecture and design systems, and develop tools such as codemods and AI agent skills. Collaborate with product, design, analytics, and engineering teams; establish quality standards; monitor availability and metrics; support on-call operations; resolve technical issues; and mentor engineers.

Build and enhance Coalition’s underwriting workbench, a data-intensive frontend application used by underwriters. Responsibilities include developing responsive React interfaces, AI-assisted workflows, complex state management, REST API integrations, performance and reliability improvements, reusable components, testing, code reviews, and roadmap contributions. The role partners closely with Product, Design, backend engineers, and underwriters to improve workflows and user outcomes.

Lead multi-quarter frontend engineering initiatives for Grafana’s DataViz squad, from problem framing through rollout and measurement. Build and evolve visualizations using TypeScript, React, uPlot, and eCharts; mentor engineers; conduct code and design reviews; support production software through on-call and incident response; assist with customer escalations; and represent the squad in cross-team planning, demos, and technical proposals.