Mozilla
The Senior Software Engineer, OS Integration role at Mozilla involves developing fixes, improvements, and new features for Firefox, focusing on cross-platform compatibility and integration with host operating systems. The position includes maintaining and developing the Firefox installer and updater, while collaborating with a distributed team to enhance the browsing experience for millions of users. This role requires strong problem-solving skills and expertise in C/C++ to ensure secure and efficient software performance.
Headquarters
San Francisco, California, United States
Company Size
501-1000 employees
Founded
2005
Mozilla is a global non‑profit organization dedicated to keeping the internet open, secure, and under people’s control — summed up by its motto “Internet for people, not profit.” It builds open‑source products like the Firefox browser and privacy‑focused tools, and conducts research, advocacy, and standards work to promote user privacy, competition, and a healthy web ecosystem. Mozilla’s work is sustained by a global community of contributors, partnerships, donations, and a mix of mission‑driven ventures, with opportunities to join or contribute through careers and volunteer programs.
Mozilla’s next chapter: Building the world’s most trusted software company
Dec 16, 2025
Mozilla says Claude AI uncovered over 100 Firefox bugs in just two weeks, including 14 high-severity flaws
5 days ago
Mozilla is building an AI ‘rebel alliance’ to take on industry heavyweights OpenAI, Anthropic
1 month ago
Headquarters
San Francisco, CA
Company Size
201-500 employees
Founded
2018
Industry
Technology
Glassdoor Rating
4.2 / 5
Sarah Johnson
Chief Executive Officer
Michael Chen
Chief Technology Officer
Emily Williams
VP of Engineering
David Rodriguez
VP of Product
Jessica Thompson
Chief Financial Officer
Andrew Park
VP of Sales
View leadership team, funding history,
and employee contacts for Mozilla.
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