Senior Staff Performance Engineer, Firefox

Mozilla
Canada
Workplace: RemoteFull timeFunction: Solutions Engineering & Sales EngineeringExperience: 7+ yearsEducation: bachelorsSkills: ["Curiosity","System-level problem-solving","Experimental mindset","Cross-functional collaboration","Asynchronous communication"]

Build and improve performance-critical parts of the Firefox browser across multiple platforms. You’ll write code and tests, prototype and profile to find bottlenecks, and use experiments to validate fixes. Partner with engineers company-wide through code reviews, tooling, documentation, and talks, while setting performance priorities, shaping benchmarks, and driving actionable next steps from high-level objectives.

Loading

Loading job details...

Preparing the role view and application actions.

FursaFursa
Mozilla
Mozilla
1 day ago

Senior Staff Performance Engineer, Firefox

✓ Verified Job

Canonical indexed version, validated from employer's careers page.

Source: Company careers pageValidated by: Fursa AI
Last checked: 31 minutes agoStatus: Live
Reposted: similar role first listed 4 weeks ago

Job Summary

Build and improve performance-critical parts of the Firefox browser across multiple platforms. You’ll write code and tests, prototype and profile to find bottlenecks, and use experiments to validate fixes. Partner with engineers company-wide through code reviews, tooling, documentation, and talks, while setting performance priorities, shaping benchmarks, and driving actionable next steps from high-level objectives.
Location: Canada
Workplace: Remote
Employment Type: Full time
Job Function: Solutions Engineering & Sales Engineering
Seniority: Mid level

Key Responsibilities

  • •Write code and tests, build prototypes, and profile/analyze performance bottlenecks
  • •Use multiple programming languages and techniques to fix performance issues with emphasis on C++ and JavaScript
  • •Educate other engineers on writing performant code through code reviews, talks, tooling, and documentation
  • •Independently define and drive actionable next steps from high-level objectives
  • •Shape performance benchmarks and set priorities for necessary improvements across the organization

Pay and Benefits

Perks:Annual BonusHealth InsuranceDentalVisionRemote WorkHome OfficeLearning BudgetWellness StipendParental LeavePaid Parental

Key Requirements

  • •BS/MS in CS or CE with 7+ years of relevant experience
  • •Strong programming proficiency in C++
  • •Understanding of JavaScript programming
  • •Proven experience developing performance-critical software
  • •Experience debugging and analyzing performance bottlenecks using profiling tools and experiments
Experience:7+ yearsWeb browserPerformance engineeringOpen-sourceDistributed teams
Education:Bachelor's in Computer Science (CS) or Computer Engineering (CE)
Skills:CuriositySystem-level problem-solvingExperimental mindsetCross-functional collaborationAsynchronous communication
Languages:English
Tech Stack:C++JavaScriptKotlinRustPythonWindowsAndroidLinuxMacOSVTuneXperfGPUMultithreadingConcurrencyDisk I/O

Company Brief

Mozilla
Mozilla is a mission-driven organization that builds open-source internet products (notably the Firefox browser) and advocates for an open, private, and secure web through software, research, and community programs.
Industry: Enterprise Software
Company Size: Large (251 to 1,000 employees)
Growth: Nonprofit & NGO
Headquarters: San Francisco, United States
Founded: 1998
Glassdoor
Glassdoor: 2.9
WebsiteLinkedInGlassdoor