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Senior Software Engineer - Engineering Workflow and CI

France; United Kingdom; Finland; Belgium; Spain; Netherlands; Sweden; Germany · Job Posted May 28, 2026
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Job Description

Firefox developers land code every day to delight users with new features and improve product performance and security. Every day, developers and managers use our team’s applications to develop, build, test, and deliver Mozilla’s core products. We are force-multipliers to enable Firefox developers to do their best work.

Job Responsibility

  • Improve Firefox development workflows to reduce time spent testing and debugging test failures as well as more integration/automation of workflows
  • Work with a geographically-distributed development team
  • Mentor other team members and be mentored by more senior team members
  • Collaborate with other teams by providing code review and technical direction
  • Look at data, make dashboards, identify trends in Firefox development workflow

Requirements

  • Proven Python skills, including building services
  • Front-end development experience, including JavaScript proficiency
  • Experience with Python frameworks (e.g., FastAPI, Flask, Django), Cloud Services (e.g., GCP, AWS) and REST
  • Solid understanding of databases and SQL
  • Experience with CI/CD systems (e.g., GitHub Actions, CircleCI) and test harnesses
  • Comfortable working cross-platform, familiar with at least 2 of: Windows, Linux, Mac, Android
  • A passion for enhancing developer productivity
  • Commitment to our values: Welcoming differences, Being relationship-minded, Practicing responsible participation, Having grit

Nice to have

  • A deep understanding of version control systems
  • Experience with containerization and continuous delivery/deployment, particularly with Docker
  • Experience with CI of large scale projects
  • Comfortable with data analysis

What we offer

  • Generous performance-based bonus plans to all eligible employees
  • Rich medical, dental, and vision coverage
  • Generous retirement contributions with 100% immediate vesting
  • Quarterly all-company wellness days
  • Country specific holidays plus a day off for your birthday
  • One-time home office stipend
  • Annual professional development budget
  • Quarterly well-being stipend
  • Considerable paid parental leave
  • Employee referral bonus program
  • Other benefits (life/AD&D, disability, EAP, etc.)

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  • Proven Python skills, including building services
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  • Commitment to our values: Welcoming differences
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Job Responsibility
  • Improve Firefox development workflows to reduce time spent testing and debugging test failures as well as more integration/automation of workflows
  • Work with a geographically-distributed development team
  • Mentor other team members and be mentored by more senior team members
  • Collaborate with other teams by providing code review and technical direction
  • Look at data, make dashboards, identify trends in Firefox development workflow
What we offer
What we offer
  • Generous performance-based bonus plans to all eligible employees
  • Rich medical, dental, and vision coverage
  • Generous retirement contributions with 100% immediate vesting (regardless of whether you contribute)
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  • Country specific holidays plus a day off for your birthday
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  • Annual professional development budget
  • Quarterly well-being stipend
  • Considerable paid parental leave
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Senior Software Engineer - Engineering Workflow and CI

Firefox developers land code every day to delight users with new features and im...
Location
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Salary
Salary:
Not provided
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Expiration Date
Until further notice
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  • Proven Python skills, including building services
  • Front-end development experience, including JavaScript proficiency
  • Experience with Python frameworks (e.g., FastAPI, Flask, Django), Cloud Services (e.g., GCP, AWS) and REST
  • Solid understanding of databases and SQL
  • Experience with CI/CD systems (e.g., GitHub Actions, CircleCI) and test harnesses
  • Comfortable working cross-platform, familiar with at least 2 of: Windows, Linux, Mac, Android
  • A passion for enhancing developer productivity
  • Commitment to our values: Welcoming differences
  • Being relationship-minded
  • Practicing responsible participation
Job Responsibility
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  • Improve Firefox development workflows to reduce time spent testing and debugging test failures as well as more integration/automation of workflows
  • Work with a geographically-distributed development team
  • Mentor other team members and be mentored by more senior team members
  • Collaborate with other teams by providing code review and technical direction
  • Look at data, make dashboards, identify trends in Firefox development workflow
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  • Annual professional development budget
  • Quarterly well-being stipend
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  • Work with a geographically-distributed development team
  • Mentor other team members and be mentored by more senior team members
  • Collaborate with other teams by providing code review and technical direction
  • Look at data, make dashboards, identify trends in Firefox development workflow
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  • Country specific holidays plus a day off for your birthday
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  • Commitment to our values: Welcoming differences
  • Being relationship-minded
  • Practicing responsible participation
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  • Improve Firefox development workflows to reduce time spent testing and debugging test failures as well as more integration/automation of workflows
  • Work with a geographically-distributed development team
  • Mentor other team members and be mentored by more senior team members
  • Collaborate with other teams by providing code review and technical direction
  • Look at data, make dashboards, identify trends in Firefox development workflow
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  • Rich medical, dental, and vision coverage
  • Generous retirement contributions with 100% immediate vesting
  • Quarterly all-company wellness days
  • Country specific holidays plus a day off for your birthday
  • One-time home office stipend
  • Annual professional development budget
  • Quarterly well-being stipend
  • Considerable paid parental leave
  • Employee referral bonus program
  • Fulltime
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Arrow Right

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Firefox developers land code every day to delight users with new features and im...
Location
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Salary:
Not provided
mozilla.org Logo
Mozilla
Expiration Date
Until further notice
Flip Icon
Requirements
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  • Proven Python skills, including building services
  • Front-end development experience, including JavaScript proficiency
  • Experience with Python frameworks (e.g., FastAPI, Flask, Django), Cloud Services (e.g., GCP, AWS) and REST
  • Solid understanding of databases and SQL
  • Experience with CI/CD systems (e.g., GitHub Actions, CircleCI) and test harnesses
  • Comfortable working cross-platform, familiar with at least 2 of: Windows, Linux, Mac, Android
  • A passion for enhancing developer productivity
  • Commitment to our values: Welcoming differences
  • Being relationship-minded
  • Practicing responsible participation
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  • Work with a geographically-distributed development team
  • Mentor other team members and be mentored by more senior team members
  • Collaborate with other teams by providing code review and technical direction
  • Look at data, make dashboards, identify trends in Firefox development workflow
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  • Rich medical, dental, and vision coverage
  • Generous retirement contributions with 100% immediate vesting
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