Développeur(euse) frontend senior - Senior Frontend Developer in Montréal

At OneSpan, we specialize in digital identity and anti-fraud solutions that create exceptional and secure experiences. As a senior frontend developer, you will play a key role in shaping and delivering the web experiences that power OneSpan’s digital agreement and e-signature products. You will take technical ownership of complex frontend initiatives, influence UI architecture and engineering best practices, and help drive the evolution of a scalable, accessible, and extensible frontend ecosystem built with modern technologies such as React, TypeScript, and micro frontends.

This is a hands-on role where you will design, build, review, and ship high-quality, responsive web applications while also mentoring other developers and collaborating closely with UX designers, product owners, architects, security specialists, and cross-functional stakeholders. This is an opportunity to have a strong voice in technical direction and to influence the future of OneSpan’s user-facing offerings. This position is open to candidates residing in Montreal. This role is hybrid, with in-office presence 2 days per week at our Montreal office.

Job Duties And Responsibilities

• Be a main contributor towards design and development of responsive, high-performance, accessible, secure, and reliable React-based web applications targeting both mobile and desktop clients.
• Take technical ownership of end-to-end frontend delivery, including React, TypeScript, and the supporting build, test, and deployment toolchain.
• Design, build, and integrate micro frontends, contributing to dynamic architecture modeling and a modular, scalable frontend ecosystem.
• Take part in system and architecture design decisions within an Agile team, partnering closely with backend, UX, and product.
• Provide technical leadership by reviewing designs and code, identifying risks early, and guiding teams toward effective solutions.
• Champion software quality by defining and enforcing best practices for unit, integration, and end-to-end testing.
• Contribute to the design, evolution, and optimization of CI/CD pipelines built on AWS and GitLab, with a focus on automation and reliability.
• Proactively identify opportunities to improve developer productivity, application performance, and user experience.
• Mentor and coach intermediate and junior developers, providing technical guidance, feedback, and knowledge sharing.
• Collaborate closely with UX design, product management, architecture, security, and other stakeholders to align technical solutions with business goals.
• Support and troubleshoot complex production issues, contributing to root-cause analysis and long-term fixes.
• Stay current with emerging frontend technologies and industry trends and help evaluate their adoption where appropriate.

Requirements

• Bachelor’s or Master’s degree in Computer Science, Software Engineering, or a related field, or an equivalent combination of education and experience.
• 8+ years of professional experience designing, developing, and maintaining web-based frontend applications.
• Deep expertise in JavaScript, TypeScript, HTML5, and CSS3, including responsive, cross-browser, and mobile-web development.
• Strong, hands-on expertise with React and its ecosystem, including hooks, component design, and state management.
• Proven experience with modular frontend architectures, including micro frontends, shared component libraries and design systems.
• Solid experience integrating with RESTful APIs, including data fetching, caching, error handling, and security best practices.
• Strong focus on frontend performance optimization, accessibility and secure coding practices.
• Familiarity with AI-assisted development tools (e.g., GitHub Copilot, Claude Code).
• Experience with software best practices such as test-driven development (TDD) and continuous integration, and with unit, integration, and end-to-end testing frameworks.
• Experience with CI/CD pipelines and automated build, test, and deployment workflows (preferably using GitLab and AWS).
• Proficiency with Git and modern branching strategies and code review practices.
• Strong problem-solving skills and the ability to debug complex frontend and production issues.
• Experience teaching, guiding, and mentoring other developers.
• Experience leading technical work end to end (designing, coding, reviewing, testing, and deploying).
• Excellent written and verbal communication skills, with the ability to collaborate across engineering, design, product, and security teams.
• Ability to work independently while taking ownership of frontend applications in a fast-paced Agile environment.

Preferred Requirements

• Experience with Node.js / Express.js for frontend tooling, backend-for-frontend (BFF), or server-side rendering.
• Experience with GraphQL client tooling such as Apollo.
• Experience building and maintaining design systems and shared component libraries.
• Strong understanding of Agile and DevOps practices.
• Prior experience leading technical initiatives or acting as a technical point of contact for a team.
• Experience influencing technical standards and best practices across teams.

Note: This position requires proficiency in a language other than French, as you will be working in partnership with internal and/or external customers outside Québec.