Senior Software Engineer, Privacy

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Senior Software Engineer, Privacy in Remote

Mozilla
Full time
Email

Remote
10/23/2026
Report

Spain

Responsibilities

Implement privacy-improving, anti-tracking, and threat-intelligence protections in Firefox to mitigate tracking and phishing.
Implement architectural improvements to Gecko, the browser engine underlying Firefox.
Build performant, low-latency, and maintainable C++, JavaScript, and Rust software.
Independently scope, deliver, and improve complex features within tight release windows.
Work asynchronously with a geographically distributed team and communicate technical decisions clearly.

Requirements

Bachelor’s degree in computer science, engineering, or a related program, or equivalent work experience.
At least 4 years of experience programming in C++ and Rust.
Strong background in memory safety, multithreaded system architecture, or raw data-stream manipulation.
Proven ability to onboard quickly and deliver complex software projects.
Excellent written and verbal communication skills.
Preferred: experience with Gecko, Chromium, WebKit, or web-engine runtime abstractions.
Preferred: experience or strong interest in ML pipelines for internal developer workflows, web architecture, web privacy and security models, client-side data structures, statistical modeling, Python, and SQL.

Benefits

Performance-based bonus plans for eligible employees.
Retirement contributions with immediate 100% vesting.
Quarterly company wellness days, country-specific holidays, and a birthday day off.
One-time home-office stipend and annual professional-development budget.
Quarterly well-being stipend and paid parental leave.
Employee referral bonus program and other country-dependent benefits including life/AD&D, disability, and EAP coverage.
Remote role based in Spain, with a listed hiring range of €58,000–€77,000 EUR annually.

Mozilla

Mozilla makes browsers, apps, code, and tools. Mozilla shapes the future of the Internet by advocating for user rights, promoting open standards, and developing software products that prioritize privacy, security, and user control. By working on the web as a platform, you can help create more opp...

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