Staff Software Engineer, Add-on Operations

Remote Canada
Posted 2 months ago
Expires June 17, 2026
Full TimeRemoteEngineering

Mozilla is seeking a Staff Software Engineer to join the Add-on Operations team, focusing on enhancing the Firefox add-ons ecosystem. This role involves working on (AMO), a platform that enables developers to publish and manage extensions, and allows users to customize their Firefox experience. The position is remote, with opportunities available in the UK, Canada, and France.

The Staff Software Engineer will be responsible for planning and delivering major features and architectural improvements across the Add-ons stack, including automated moderation pipelines, reviewer tools, and the Developer Hub. Key duties include setting operations engineering standards, mentoring engineers, improving platform reliability through deployments and monitoring, and ensuring the platform's security and user trust. The role also involves resolving issues impacting users and developers, collaborating with cross-functional teams, and contributing to open-source projects.

Candidates should have experience leading and building modern web applications, with strong proficiency in Python/Django or similar backend frameworks. An understanding of web security principles, excellent collaboration and communication skills in a distributed team environment, and the ability to navigate ambiguity and align stakeholders on engineering vision are essential. Experience mentoring and supporting junior engineers is also required.

Mozilla offers generous performance-based bonus plans, comprehensive medical, dental, and vision coverage, and substantial retirement contributions with immediate vesting. Additional benefits include quarterly wellness days, country-specific holidays plus a day off for your birthday, a one-time home office stipend, an annual professional development budget, and considerable paid parental leave.

Joining Mozilla means becoming part of a mission-driven organization dedicated to building an open and accessible internet. The company values diversity, equity, inclusion, and belonging, encouraging applications from all equity-seeking communities. Employees have the opportunity to work on impactful projects that reach millions of users worldwide, contributing to a safer and more user-centric internet.

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