Senior Software Engineer, Privacy

About this role

Develop privacy and anti-tracking protections for Firefox and improve the Gecko browser engine. Build performant, maintainable software that helps protect users from tracking and phishing.

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 architecture of Gecko
• Build performant, low-latency, maintainable software
• Collaborate asynchronously with a distributed team across Europe and the US East Coast

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 improvements to complex software
• Experience independently scoping and shipping complex features within tight release windows
• Excellent written and verbal communication skills

Nice to have

• Contributions to Mozilla or its codebase
• Experience with browser engines such as Gecko, Chromium, or WebKit
• Experience or interest in using ML pipelines to automate developer workflows
• Deep understanding of web architecture, web privacy and security, and client-side data structures
• Basic statistical modeling knowledge
• Proficiency with Python and SQL

Benefits

• Performance-based bonus plan
• Retirement contributions with immediate vesting
• Quarterly company-wide 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