Senior Software Engineer, Privacy en España

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.