Top Front End Developer Jobs in Montreal

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.

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.

Designs, develops, tests, reviews, deploys, and supports scalable React and TypeScript web applications. Leads frontend architecture, micro-frontend integration, performance, accessibility, security, CI/CD, and software quality practices. Provides technical leadership through design and code reviews, mentors junior and intermediate developers, troubleshoots production issues, and collaborates with UX, product, backend, architecture, and security teams.

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.

Frontend Developer Interns will build and maintain web interfaces, reusable frontend libraries, and customer-facing admin console features. Responsibilities include managing Jira tickets, contributing to software projects, participating in code reviews, testing implementations, collaborating with backend, UX, and QA teams, and learning from experienced mentors. Interns will work on search experiences or Coveo organization management tools in a hybrid engineering environment.

Frontend Developer Interns will build reusable frontend libraries, search experiences, and Coveo administration console features. Responsibilities include managing Jira tickets, implementing and testing features, participating in code reviews, collaborating with UX, QA, and backend teams, and applying feedback under mentorship. Interns will contribute to real-world projects while developing software engineering and project ownership skills.

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.

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.

Develop full-stack enterprise application features using TypeScript, React, C#, and .NET, with emphasis on user experience, performance, scalability, and maintainability. Design and present technical solutions, build automated tests, prototype solutions, collaborate with engineering, product, and UX teams, and adopt emerging technologies including generative AI. The role also involves leading complex feature development, creating reliable APIs, and mentoring junior engineers.

Build and maintain frontend-leaning, full-stack Creative and Studio products using React and Next.js. Develop AI interfaces, UX/UI workflows, proof-of-concept products, integrations, and end-to-end features. Collaborate with Design, Engineering, Growth, and Sales; iterate based on user feedback; maintain scalable, secure infrastructure; process large datasets; and mentor less experienced engineers. The role emphasizes strong portfolio work and demonstrated software engineering ability rather than formal degrees or certifications.

As a Front-End Web Developer, you will develop online advertising campaigns, optimize codes, and support the creative team with banners and newsletters.

The Front-End Web Developer will collaborate with the creative team to develop online advertising campaigns and implements technical solutions while ensuring quality control.

As a front-end developer at Squarepoint, you will enhance user experience on trading platforms using React and TypeScript to develop applications for real-time data access.

Build and refine front-end experiences for web and mobile: onboarding, checkout, gallery features, design system and enterprise dashboard. Collaborate closely with designers and PMs, ship fast, maintain aesthetic quality, and iterate with user feedback using React, Next.js and TypeScript.

Build and maintain responsive, accessible frontend interfaces using React and TypeScript. Collaborate with product, design, and backend teams to launch performant, scalable UIs, create reusable component libraries, define APIs, mentor engineers, and drive frontend best practices.

The Staff/Lead Fullstack Engineer will enhance the Mimica Webapp by architecting scalable UI components, managing large datasets, and optimizing performance while collaborating with cross-functional teams.

Founding front-end engineer to design and build Flick's editor UI (canvas, timeline, node graph, playback). Lead architecture, prototype creative workflows, optimize complex UX interactions, establish code quality and performance practices, collaborate with design/product/AI backend, and drive key technical and product decisions.

Seeking a Front End Developer to build Splunk-based solutions, implement requirements, test changes, provide demonstrations, and support users.

Develop high-performance frontend applications, collaborate with design and backend teams, ensure quality coding practices, and improve platform scalability and performance.

Design and implement frontend applications using JS, CSS, React, and Flutter. Collaborate on technical specs and contribute to documentation, ensuring user experience and performance.

Build sophisticated user interfaces for AI and blockchain interactions, including monitoring tools and decentralized application interfaces, while collaborating across teams for seamless user experience.