CareerPlan

Senior Software Engineer, Firefox Security

Remote GermanyRemoteFull-time€53k2026-10-14 → 2026-11-10
Remote

Core

Design, build, and implement security and hardening features for Firefox to strengthen its security posture and architecture across multiple operating systems.

Role type

Senior IC security software engineer

Builds

Firefox browser security features and hardening mechanisms

Domain

Web browser security, systems programming

Required skills

C, C++, systems programming, security fundamentals, debugging multithreaded applications, memory management, cross-platform development

Preferred skills

Rust, Web technologies (HTML, CSS, JavaScript), privilege isolation, cryptographic protocols

Technologies

Firefox, C, C++, Rust, WebPKI

Responsibilities

Design and implement security features for enterprise users, improve Firefox's core security mechanisms, investigate and fix security issues, diagnose and resolve stability and performance issues

Seniority

Senior, hands-on IC