Senior Software Engineer, Add-Ons
Firefox · Remote Finland
About this role
**Why Mozilla?** Mozilla Corporation is a non-profit-backed technology company that has shaped the internet for the better over the last 25 years. We make pioneering brands like Firefox, the privacy-minded web browser. With more than 225 million people around the world using our products each month, we’re shaping the next 25 years of technology and helping to reclaim an internet built for people, not companies. Our work focuses on diverse areas including AI, social media, security, and more—while never losing focus on our core mission: **to make the internet better for people**. --- **About this team and role** **addons.mozilla.org (AMO)** is the foundation of the Firefox add-ons ecosystem. It’s a showcase for developers to publish and grow their extensions, and a place of discovery for millions of users who customize Firefox. Behind the scenes are: - **DevHub**: enables developers to manage their extensions - **Reviewer tools** and **automated moderation systems**: help manage the ecosystem As a **Senior Software Engineer**, you’ll craft resilient systems that accelerate our review and moderation teams—delivering a first-class experience for Add-on developers. You’ll work closely with engineers, reviewers, developer support, and Add-ons leadership to turn ideas into polished features, modernize the platform and its architecture, and see your work reach millions of people worldwide. --- **What you’ll do** - Deliver major features and architectural improvements across the Add-ons stack, including automated moderation pipelines, Reviewer tools, and DevHub. - Help establish and maintain engineering standards (e.g., code review, definition of done, production readiness, runbooks, incident response, on-call practices, coding conventions, and infrastructure as code). - Create robust observability systems and data-backed insights. - Provide peer feedback, share knowledge, and help others grow.
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