94K–139K CAD / year

Senior Software Engineer, Add-Ons

BackendWorkplace — Canada
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

The Senior Software Engineer for Add-Ons will enhance the Firefox add-ons ecosystem by developing features and improving platforms for developers and users. The role involves collaboration with various teams to modernize architecture while ensuring a reliable user experience.

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 major features and architectural improvements
  • Establish engineering standards
  • Create robust observability systems
  • Provide peer feedback and mentorship
  • Improve CI/CD pipelines
  • Document technical processes
  • Collaborate with cross-functional teams
  • Work on feature development and internal developer platforms

What we're looking for

  • Experience with Python/Django
  • Reliability in production software systems
  • Familiarity with CI/CD systems
  • Automated testing and deployment workflows experience
  • Understanding of observability practices
  • Experience developing internal tools
  • Ability to read and understand codebases
  • Strong technical writing skills

Nice to have

  • Experience with Google Cloud and Kubernetes
  • Infrastructure-as-code tooling knowledge
  • Experience with chaos engineering
  • Contributions to open source projects

Benefits

  • Performance-based bonuses
  • Rich medical, dental, and vision coverage
  • Generous retirement contributions
  • Wellness days
  • Paid parental leave
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