Build Firefox fixes and features remotely in Canada using C and C++ across Windows, macOS, and Linux operating systems.
As a Senior Software Engineer on Mozilla’s OS Integration team, you will improve Firefox and other Mozilla products. You will develop cross-platform changes, maintain the installer and updater, and address operating-system-specific defects. The work includes code reviews, debugging, secure coding, and collaboration with distributed engineering teams.
Key Responsibilities: Debug and fix software defects affecting Firefox quality
Develop cross-platform features and operating system improvements
Maintain and develop Firefox installer and updater components
Perform code reviews and provide technical direction
Collaborate across geographically distributed development teams
Requirements: Five or more years of software engineering experience
Strong knowledge of C and C++
Desktop application development experience on Windows, macOS, or Linux
Knowledge of secure coding and memory safety concerns
Solid problem-solving, debugging, and communication skills
Apply C++, debugging, and cross-platform engineering expertise to Firefox OS integration at Mozilla, remotely from Canada.

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📌 Senior C++ OS Integration Engineer (Manitoba)
🏢 Mozilla
📍 Manitoba