Jobgether

This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Senior Security Engineer, Add-ons Operations based in Canada.

This role sits at the intersection of security engineering, platform reliability, and ecosystem trust for a large-scale add-ons marketplace used by millions of users worldwide. You will help safeguard the integrity of extension submission, review, and moderation systems while improving the infrastructure that powers developer and reviewer workflows. The environment is highly collaborative and mission-driven, with a strong emphasis on open collaboration, transparency, and user trust. You will work across engineering, product, and operations teams to design resilient systems that detect abuse, prevent malicious behavior, and ensure policy compliance. The role also involves modernizing tools and services that support developers and reviewers. You will contribute directly to both backend and full-stack systems in a fast-moving, globally distributed team. Your work will have direct impact on platform safety, reliability, and user experience at global scale.