Senior Software Engineer, Add-Ons

MozillaNorth AmericaSeniorSoftware Engineering

The role

Mozilla is hiring a Senior Software Engineer for the addons.mozilla.org team, which runs the Firefox add-ons site, developer hub, reviewer tools and moderation systems. The work covers features, reliability and engineering practices on a Python/Django stack.

What you will do

  • Deliver features and architecture improvements across AMO, including moderation pipelines, Reviewer tools and DevHub.
  • Help set engineering standards such as code review, production readiness, runbooks, incident response and on-call practice.
  • Build observability and data-backed insights, and improve CI/CD pipelines as code.
  • Create internal tooling that helps teams ship and operate software safely.
  • Write design notes, ADRs, runbooks and incident write-ups.
  • Collaborate with designers, product managers, QA and community contributors.

What they ask for

  • Strong hands-on experience building and maintaining production Python/Django applications.
  • Experience operating production systems where reliability and safe delivery matter.
  • Strong CI/CD experience, treating pipelines and infrastructure as code.
  • Understanding of observability: metrics, logging, tracing, SLOs and alerting.
  • Ability to trace behavior through unfamiliar codebases across frontend, backend, async jobs and infrastructure.
  • Strong technical writing and collaboration in a distributed team.
  • Nice to have: Google Cloud, Kubernetes, infrastructure-as-code.

This is our own short reading of the posting. The full description, and anything that has changed since, is on Mozilla's careers page behind the apply button.

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