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Staff Security Engineer, Product Security

Job Overview

Location

Remote Canada

Job Type

Full-time

Category

Software Engineering

Date Posted

April 14, 2026

Full Job Description

📋 Description

  • As a Staff Security Engineer in Product Security at Mozilla, you will protect the vision of an open and accessible internet by building, breaking, and hardening products that prioritize user privacy and safety, directly impacting millions of Firefox, Mozilla VPN, and other mission-critical product users worldwide.
  • Day to day, you will embed security into the full Software Development Life Cycle (SDLC), perform threat modeling and security assessments, conduct security code reviews, lead penetration testing on web, mobile, and embedded applications, develop automated security tests in CI/CD pipelines, and partner with engineering teams to integrate security as a core design principle rather than an afterthought.
  • You will join Mozilla Corporation, a non-profit-backed technology company wholly owned by the Mozilla Foundation, dedicated to shaping the internet for people over profit, with over 225 million monthly users relying on its open-source products like Firefox and a global community of volunteers contributing to its mission.
  • In this role, you will deepen your expertise in secure coding, application security (SAST/DAST), cloud security (AWS/Azure/GCP), and automation, while influencing Mozilla’s security culture through guidance, education, and collaboration, and advancing your ability to lead security initiatives in complex, distributed systems.

Skills & Technologies

Python
JavaScript
Java
AWS
Azure
Senior
Remote

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Mozilla Corporation
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About Mozilla Corporation

Mozilla Corporation is a wholly-owned subsidiary of the Mozilla Foundation that develops, maintains, and distributes the Firefox web browser and related open-source software. Founded in 2005 and headquartered in Mountain View, California, it operates as the for-profit arm of the non-profit Mozilla Foundation, ensuring the continued development of open, interoperable internet technologies while funding the foundation’s public-benefit mission. The corporation generates revenue primarily through search partnerships and premium services, reinvesting profits into advancing privacy, security, and user empowerment across the web.

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