Senior Software Engineer, Platform Reliability

Company: Mozilla
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Job Description:

Mozilla is seeking a Senior Software Engineer for the Add-ons team. You will drive feature development, modernize the DevHub and Reviewer tools, and help scale automated moderation pipelines across the Firefox add-ons ecosystem.

You will work with Python/Django, MySQL, React/TypeScript, and asynchronous processing, in a heavily collaborative, open-source-inspired environment with a focus on reliability and impact.

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Posted: October 2nd, 2026