Mozilla is hiring for a Senior Software EngineerMozilla Foundation is committed to an internet that promotes civil discourse, human dignity, and individual expression. To an internet that catalyzes collaboration among diverse communities working together for the common good.
Job detailsLocationRemote — Spain, Germany, Canada, France, or UKCAD $94,000–139,000 per annumContractTemporaryThis role sits within the Firefox team and supports addons.mozilla.org (AMO), the foundation of the Firefox add-ons ecosystem — connecting Add-on developers, reviewers, and users through DevHub, Reviewer tools, and automated moderation systems.
The post-holder will deliver major features and architectural improvements across the Add-ons stack, build robust observability systems,



improve platform reliability through deployments, monitoring, and incident response, help keep the platform safe and trustworthy, and collaborate with designers, product managers, QA, and community contributors on full-stack development (React/TypeScript, Django, MySQL) hosted on Google Cloud. Strong experience with Python/Django or similar backend frameworks, web security principles, and distributed-team collaboration required.
Contract: Not specifiedSalary: CAD $94,000–139,000 per annum (Canada tiers; varies by country)Hours: Not specifiedLocation: Remote — Spain, Germany, Canada, France, or UK

📌 Mozilla is hiring for a Senior Software Engineer (España)
🏢 EDRi
📍 España