Senior Privacy Engineer, Firefox Web Platform

Mozilla; United Kingdom; Remote; GBP 66,000 - 87,000; Full time

Benefits offered by this job

Performance bonus

Retirement contributions

Home office stipend

Annual development budget

Wellbeing stipend

Job summary

Mozilla is seeking a Senior Software Engineer to join the Privacy Team and advance the Firefox Web Platform. You will work on privacy protections, anti-tracking and threat intelligence, shaping the browser for a safer user experience.

You'll contribute to Gecko and core browser architecture, write performant C++, Rust, and JavaScript, and collaborate with a distributed team across Europe and the US. Remote UK options available.

Qualifications

• Bachelor's degree in CS/Engineering or equivalent work experience.
• 4+ years with C++ and Rust; memory safety, multi-threaded systems, or data stream manipulation.
• Proven ability to onboard quickly and deliver complex software features.
• Excellent written and verbal communication skills.

Responsibilities

• Implement privacy‑improving, anti‑tracking protections and threat intelligence into the Firefox browser.
• Improve Gecko architecture and overall browser performance.
• Develop in C++, JavaScript and Rust; maintainable, low-latency code.
• Collaborate across a geographically distributed team (Europe and US-East).

Skills

C++

Rust

Memory safety

Multithreaded

Data streams

Onboard quickly

Complex features

Communication

Education

Bachelor's degree in CS/Engineering

Job description

Mozilla is seeking a Senior Software Engineer to join the Privacy Team and advance the Firefox Web Platform. You will work on privacy protections, anti-tracking and threat intelligence, shaping the browser for a safer user experience.

You'll contribute to Gecko and core browser architecture, write performant C++, Rust, and JavaScript, and collaborate with a distributed team across Europe and the US. Remote UK options available.