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.

Build a high-performance frontend data platform for exploring and analyzing hardware telemetry. Develop React and TypeScript applications, interactive time-series visualizations, data visualization plugins, complex application state management, and LLM-assisted analysis workflows. Collaborate directly with hardware engineers and customers to define interfaces, prototype workflows, demonstrate features, and incorporate feedback into product development.

Own and evolve high-traffic consumer web experiences, experimentation, instrumentation, marketing technology integrations, conversion tracking, and measurement systems. Lead engineers through ambiguous projects, define technical plans, improve reliability and observability, support on-call operations, establish quality standards, and mentor team members. Partner with Product, Marketing, Analytics, Data Engineering, and platform teams to build performant, privacy-aware systems that address consent, cookies, tagging, and consumer-data requirements.

Build and improve high-traffic consumer web experiences using React and TypeScript. Develop experimentation, instrumentation, marketing integrations, attribution, and measurement systems while meeting privacy requirements. Collaborate with Product, Design, Marketing, Analytics, and Data Engineering, write tested and extensible code, monitor system metrics, support availability and on-call efforts, participate in code reviews, and contribute to team development.

Build and maintain accessible React component libraries, design tokens, tooling, documentation, and AI-enabled development capabilities for an enterprise design system. Design durable APIs, support cross-platform component foundations, improve developer adoption, and ensure robust testing and accessibility compliance. Collaborate with designers, architects, product teams, and a large engineering community while contributing to agile delivery, release automation, and ongoing engineering culture transformation.

Build and support enterprise Adobe Experience Manager solutions across backend, frontend, architecture, and DevOps disciplines. Responsibilities include developing Java and OSGi services, Sling components, HTL-based interfaces, React or Angular integrations, AEM migrations, cloud architecture, Dispatcher configuration, security, and Adobe Cloud Manager CI/CD pipelines. Assignments typically last 6–12 months and may be remote or hybrid.

Lead front-end development by designing and implementing high-quality, scalable software; driving technical requirements, API design, integrations, code reviews, testing, documentation, and coding standards. The role facilitates team success, supports Scrum activities, troubleshoots software and infrastructure issues, collaborates with technical and non-technical stakeholders, and contributes to architecture, process improvement, and major technology initiatives.

Leads front-end software development by designing and implementing high-quality code, guiding technical requirements and solutions, conducting code reviews, supporting testing, troubleshooting infrastructure and applications, and mentoring the team. The role contributes to API and microservices design, database performance, third-party integrations, documentation, Scrum activities, technical standards, and major technology initiatives while collaborating with technical and non-technical stakeholders.

Designs, develops, tests, deploys, and maintains accessible, responsive frontend applications for an enterprise platform. Translates designs and requirements into reusable components, integrates interfaces with APIs and enterprise services, and applies secure coding, accessibility, performance, and testing standards. Collaborates with UX, product, architecture, backend, QA, security, and DevOps teams. Troubleshoots complex application and integration issues, supports releases and production stabilization, and maintains technical documentation.

Designs, develops, tests, documents, deploys, and supports front-end applications and customized GIS web mapping solutions. Builds responsive, accessible interfaces using JavaScript, TypeScript, React, HTML, and CSS; integrates ArcGIS services, portals, workflows, and external systems; troubleshoots technical issues; and collaborates with stakeholders throughout the software development lifecycle.

Build and optimize Jobber’s content-driven marketing website using Next.js, React, TypeScript, and Sanity. Develop reusable components, APIs, experiments, accessible and high-performance pages, and AI-assisted workflows. Mentor developers, establish engineering standards, support SEO and AI search initiatives, and collaborate with product, design, marketing, and CRO stakeholders. This is a senior individual-contributor role without people-management responsibilities.

Build and own frontend product experiences across web, React Native POS, mobile apps, customer touchpoints, and internal tools. Collaborate with product and backend engineers to create intuitive workflows, integrate APIs, improve performance and architecture, and support data-rich real-time operational experiences. Responsibilities include testing, debugging production issues, addressing edge cases, and continuously improving usability and maintainability.

Own the customer-facing user experience and workflows for mCloud. Build performant React dashboards, topology visualizations, telemetry and alert views, gateway management tools, and administrative workflows. Collaborate with Product, Design, Backend Engineering, and other teams to integrate GraphQL and REST services, improve reliability and observability, and use AI-assisted development tools to accelerate component, query, and test creation.

Lead the architecture and development of high-performance front-end applications using React Native and Angular. Mentor engineers, establish engineering standards, optimize real-time streaming and application performance, guide technology strategy, promote AI adoption, and collaborate with product, UX, architecture, and engineering teams to deliver scalable web and mobile experiences.

Develop and own front-end and full-stack web applications for Citi’s trade processing platform. Build React and HTML5 interfaces, modernize legacy UI components, integrate .NET/C# services, and ensure automated testing, security, compliance, and design quality. Responsibilities include requirements analysis, implementation, technical recommendations, production support, stakeholder consultation, risk assessment, process standards, and mentoring junior team members. The role supports capital markets applications and requires independent judgment and collaboration across technology and business teams.

Lead the evolution of Seeq’s frontend infrastructure, including React systems, state management, design systems, reusable patterns, and developer experience. Build accessible, responsive, maintainable components; evaluate open-source technologies; guide large-scale refactors; diagnose complex defects and performance issues; and establish technical standards adopted across teams. Collaborate with engineers, designers, product teams, and customers through reviews, mentoring, documentation, and cross-functional communication.

Join the Front End Platform team for a four-month internship building React components from Figma specifications, implementing reusable components in customer-facing applications, and helping establish frontend standards, tooling, and best practices. The role involves cross-functional collaboration, design and development process improvements, and contributing to scalable, accessible frontend experiences in a remote-first environment.

Build and scale customer-facing web applications across ecommerce, point-of-sale, reservation, and CRM products. Collaborate with backend, product, and QA teams to integrate APIs, deliver production-ready features, improve UX and responsiveness, maintain frontend architecture and state management, participate in code reviews, and document frontend workflows and component patterns.

Build and operate customer-facing frontend experiences for search, recommendations, and generative AI. Own software development end to end, including architecture, implementation, testing, delivery, observability, and long-term evolution. Collaborate with backend, machine learning, product, and design teams; review code, advise on technical designs, participate in interviews, and mentor engineers. Improve performance, scalability, accessibility, maintainability, and developer experience across complex frontend systems.

Build polished, responsive front-end applications for Chiri Brain and client-specific AI solutions. Design user flows, prototypes, interfaces, reusable components, and design systems while integrating APIs, authentication, business data, agent workflows, and security controls. Work directly with customers and stakeholders to understand needs, rapidly prototype, gather feedback, and ship production-quality software. Help establish scalable front-end architecture and use AI-assisted development tools to accelerate delivery.

Develop and maintain responsive Angular-based user interfaces for Smile Digital Health’s Clinical Intelligence platform. Responsibilities include translating designs into scalable applications, writing code and unit tests, conducting code reviews, contributing to architecture and technical strategy, resolving defects, documenting components, collaborating with cross-functional teams, and mentoring developers. The role also involves client participation and adherence to coding, Agile, and Scrum practices.

Build and maintain frontend interfaces for calling, messaging, voicemail, transcription, and related workflows. Develop dashboards, observability tooling, and customer-facing features using React, TypeScript, GraphQL, WebSockets, and WebRTC. Own projects end to end, write unit and integration tests, improve accessibility and performance, fix bugs, document systems, and collaborate with product, design, and backend engineering teams in a remote environment.

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.