Senior Security Engineer, Add-ons Operations
About The Position
The Add-ons team at Mozilla is responsible for the addons.mozilla.org (AMO) platform, which is the foundation of the Firefox add-ons ecosystem. This platform serves as a showcase for developers to publish and grow their extensions, and a discovery point for millions of users who customize Firefox. The team manages the ecosystem through tools like DevHub, Reviewer tools, and automated moderation systems. As a Senior Software Engineer - Operations, you will contribute to crafting resilient systems that enhance the efficiency of the review and operations teams, ultimately providing a first-class experience for Add-on developers. You will collaborate with engineers, reviewers, developer relations, and Add-ons leadership to develop new features, modernize the platform and its architecture, and ensure your work reaches a global audience.
Requirements
- Experience building modern web applications.
- Strong experience with Python/Django or similar backend frameworks.
- Understanding of web security principles and practices.
- Strong collaboration and communication skills in a distributed team environment.
- Adept at navigating ambiguity, exploring solutions, and shaping direction in new problem spaces.
- Commitment to our values: Welcoming differences, Being relationship-minded, Practicing responsible participation, Having grit.
Nice To Haves
- Experience in building automated security systems.
- Exposure to cloud infrastructure (Google Cloud or similar).
- Contributions to open source projects.
- Experience with policy-compliant ecosystem moderation tools.
Responsibilities
- Deliver major features and architectural improvements across the Add-ons stack, including automated moderation pipelines, Reviewer tools, and DevHub.
- Create robust observability systems and data-backed insights.
- Provide peer feedback, share knowledge and help others grow.
- Improve platform reliability through deployments, monitoring, and incident response.
- Help keep the platform safe and trustworthy, with attention to security and user trust.
- Resolve issues impacting users and developers, from small bugs to larger incidents.
- Collaborate with designers, product managers, QA, and community contributors to deliver end-to-end improvements.
- Contribute in the open through pull requests, code reviews, and discussions.
Benefits
- Generous performance-based bonus plans
- Rich medical, dental, and vision coverage
- Generous retirement contributions with 100% immediate vesting
- Quarterly all-company wellness days
- Country specific holidays plus a day off for your birthday
- One-time home office stipend
- Annual professional development budget
- Quarterly well-being stipend
- Considerable paid parental leave
- Employee referral bonus program
- Other benefits (life/AD&D, disability, EAP, etc. - varies by country)
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What This Job Offers
Job Type
Full-time
Career Level
Senior
Education Level
No Education Listed
