45K–60K EUR / year

Senior Software Engineer, Add-Ons

BackendRemote — Finland
Published on 2026-09-24
These details were extracted automatically from the original listing. They may not be complete or fully up to date — it's worth checking the original job post.

About this role

Join Mozilla as a Senior Software Engineer focused on the Firefox add-ons ecosystem. You will craft resilient systems to enhance the developer experience and improve moderation tools. Collaborate across teams to deliver features, improve infrastructure, and ensure production reliability.

About the company

Mozilla builds open-source products and technologies, including Firefox, that prioritize privacy, security, and an open internet.

The team

Add-ons team

Stack

PythonDjangoMySQLReactTypeScript

What you'll do

  • Deliver features and architectural improvements
  • Establish and maintain engineering standards
  • Create observability systems
  • Provide peer feedback and mentorship
  • Improve the CI/CD pipelines
  • Document technical details
  • Collaborate with cross-functional teams

What we're looking for

  • Experience with Python/Django in production
  • Understanding of CI/CD systems
  • Experience in automated testing and deployment workflows
  • Strong knowledge of observability practices
  • Experience with internal tools for engineering teams
  • Ability to trace application behavior in complex systems

Nice to have

  • Experience with Google Cloud and Kubernetes
  • Familiarity with infrastructure-as-code tooling
  • Experience with automated moderation systems

Benefits

  • Generous performance-based bonuses
  • Rich medical, dental, and vision coverage
  • Generous retirement contributions
  • Quarterly wellness days
  • Paid parental leave
  • Professional development budget
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