Senior Software Engineer, Privacy

About this role

Build privacy and anti-tracking protections for Firefox, helping protect users from tracking and phishing. Improve Gecko browser architecture and deliver performant, maintainable software for a large global user base.

About the company

Mozilla builds open-source products and technologies, including Firefox, that prioritize privacy, security, and an open internet.

The team

Mozilla Privacy Team

Stack

What you'll do

• Implement privacy, anti-tracking, and threat-intelligence protections in Firefox
• Improve the Gecko browser engine architecture
• Build performant, low-latency, maintainable code
• Collaborate asynchronously with a geographically distributed team

What we're looking for

• Bachelor’s degree in computer science, engineering, or a related field, or equivalent experience
• At least 4 years of C++ and Rust programming experience
• Strong background in memory safety, multithreaded system architecture, or raw data stream manipulation
• Ability to quickly onboard and deliver complex software projects
• Ability to scope and land complex features within tight release windows
• Excellent written and verbal communication skills

Nice to have

• Contributions to Mozilla or its codebase
• Browser or web-engine experience, such as Gecko, Chromium, or WebKit
• Interest or experience in ML pipelines for developer workflows
• Understanding of web architecture, web privacy and security, and client-side data structures
• Basic statistical modeling knowledge
• Python and SQL proficiency

Benefits

• Performance-based bonus
• Retirement contributions with immediate vesting
• Quarterly company wellness days
• Country-specific holidays and a birthday day off
• One-time home-office stipend
• Annual professional-development budget
• Quarterly well-being stipend
• Paid parental leave