Browser Extension Engineer

7 days ago


Toronto, Ontario, Canada Proofpoint Full time $120,000 - $180,000 per year

It's fun to work in a company where people truly BELIEVE in what they're doing

We're committed to bringing passion and customer focus to the business.

Corporate Overview
Proofpoint is a leading cybersecurity company protecting organizations' greatest assets and biggest risks: vulnerabilities in people. With an integrated suite of cloud-based solutions, Proofpoint helps companies around the world stop targeted threats, safeguard their data, and make their users more resilient against cyber-attacks. Leading organizations of all sizes, including more than half of the Fortune 1000, rely on Proofpoint for people-centric security and compliance solutions mitigating their most critical risks across email, the cloud, social media, and the web.
We are singularly devoted to helping our customers protect their greatest assets and biggest security risk: their people. That's why we're a leader in next-generation cybersecurity.
Protection Starts with People.  Proofpoint.

The Role

As a Software Engineer on our latest security product team, you will be building web browser extensions with a focus on cybersecurity used by Fortune 100 customers to protect their business-critical communications. The ideal candidate will bring expertise in creating extensions across multiple desktop and mobile platforms. This is a uniquely challenging role: we empower small teams to make large impacts, the scale of our user base is legitimately huge, and we're building product that is mission-critical to our customers 24/7/365.

Your day-to-day

  • Design and develop browser extensions for Chrome, Edge, Firefox, and Safari (desktop and mobile)

  • Implement cybersecurity features and best practices in extension development

  • Collaborate with our engineering team to integrate extensions with existing security infrastructure

  • Optimize extension performance and ensure cross-browser compatibility

  • Conduct code reviews and contribute to technical documentation

What you bring to the team

  • Proven experience developing browser extensions for multiple platforms (Chrome, Edge, Firefox, Safari)

  • Experience with mobile browser extension development, particularly for Safari on iOS

  • Strong knowledge of JavaScript, HTML, and CSS * Familiarity with browser extension APIs and their security models

  • Understanding of web security principles and common vulnerabilities

  • Experience with version control systems (e.g., Git)

  • Experience with continuous integration and deployment (CI/CD) for browser extensions

    Why Proofpoint
    Protecting people is at the heart of our award-winning lineup of cybersecurity solutions, and the people who work here are the key to our success.  We're a customer-focused and a driven-to-win organization with leading-edge products. We are an inclusive, diverse, multinational company that believes in culture fit, but more importantly 'culture-add', and we strongly encourage people from all walks of life to apply.

    We believe in hiring the best and the brightest to help cultivate our culture of collaboration and appreciation. Apply today and explore your future at Proofpoint #LifeAtProofpoint

If you like wild growth and working with happy, enthusiastic over-achievers, you'll enjoy your career with us



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