Platform Security Engineer – Open-Source & Moderation

Company: Mozilla
Apply for the Platform Security Engineer – Open-Source & Moderation
Location: Hyde Park Corner
Job Description:

A Senior Software Engineer – Operations at Mozilla in London will help build resilient systems for the Add-ons review and operations team, accelerating delivery to millions of users.

You will own full stack features (React/TypeScript frontends, Django backend, MySQL datastore), strengthen platform reliability, observability, and security, and contribute through open collaboration with Mozilla staff and the community.

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Posted: September 22nd, 2026