Senior Staff Performance Engineer, Firefox

Mozilla · IT

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Full Time$149,000 - $220,000 CADPosted Aug 24, 2026

Source: Mozilla

AT A GLANCE
Eligibility
Not available
Category
IT
Salary
$149,000 - $220,000 CAD
Employment
Full Time
Experience
Staff
Posted
Aug 24, 2026

This role’s source listing does not include Hungary as an eligible location.

Mozilla is seeking a Senior Staff Performance Engineer to optimize the Firefox browser while working remotely from Canada.

As a key member of the Firefox Performance team, you will profile complex codebases, define architectural strategies for performance improvements, and mentor other engineers. This role involves deep-dive analysis into browser bottlenecks using C++ and JavaScript, working within a distributed team to maintain high technical standards for a global open-source product.

Why You’ll Love This Role

Remote Canada
$149,000 - $220,000 CAD salary range
Staff seniority level
Performance engineering focus
Comprehensive benefits package

What You’ll Bring

7+ Years relevant experience
Mastered understanding of programming in C++
Understanding of programming in JavaScript
Proven experience developing performance critical software
Skill in debugging and analyzing performance bottlenecks using profiling tools
Experience with multithreading, concurrency, disk I/O, and GPU

What You’ll Get

Generous performance-based bonus plans
Rich medical, dental, and vision coverage
Generous retirement contributions with 100% immediate vesting
Quarterly all-company wellness days
One-time home office stipend
Annual professional development budget
Quarterly well-being stipend
Considerable paid parental leave

About the Company

Mozilla Corporation is a mission-driven technology company known for developing the Firefox web browser. It is wholly owned by the non-profit Mozilla Foundation and focuses on promoting an open and accessible internet for all users.

Listing checked for remote eligibility · Posted Aug 24, 2026 · MozillaApply →
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