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Senior Software Engineer, APZ (Asynchronous Pan & Zoom)

Mozilla· Firefox
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Remotefull-timePosted 3mo ago

About the role

Engineering role focused on Pan, Scrolling, Zoom, Page Layout, CSS, images, text, printing, and animations in Gecko. Design and develop standards-compliant CSS and page layout features, with a current focus on Asynchronous Pan and Zoom (APZ) for Firefox across multiple platforms.

Responsibilities

  • Work cooperatively with other Mozillians to identify and correct issues, and ask for help as needed
  • Write high-quality, performant, open source, and standards compliant code
  • Develop innovative layout, graphics, and user interaction techniques, algorithms and tools to maximize the rendering quality and performance of Firefox
  • Participate in regular code reviews, team meetings and long-term planning
  • Help triage and test bugs, taking the initiative to drill down to root causes and explore potential solutions

Qualifications

  • Bachelor’s degree or equivalent experience in Computer Science or similar field
  • Experience developing C/C++ and/or Rust applications
  • Strong debugging and optimization skills in a multi-threaded environment
  • Experience with memory and performance optimization tools
  • Proven record of finishing projects where the work spans several months
  • Experience participating in and contributing to open source projects and/or web browser development would be beneficial
  • Excellent written and verbal communication skills
  • Ability to quickly learn and be effective with a large code base

Skills

Required:C/C++RustMultithreaded debugging/optimizationMemory and performance optimization tools

Benefits

  • Generous performance-based bonus plans to all eligible employees - we share in our success as one team
  • Rich medical, dental, and vision coverage
  • Generous retirement contributions with 100% immediate vesting
  • Quarterly all-company wellness days where everyone takes a pause together
  • 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. - varies by country)
Last updated Oct 21, 2026. Interested? Apply on the company site.

About Mozilla

Internet for people, not profit

Mozilla is the not-for-profit behind the lightning fast Firefox browser. We put people over profit to give everyone more power online.

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