Senior Manager, Firefox Machine Learning

Why Mozilla?

Mozilla Corporation is a technology company supported by a non-profit organization, dedicated to improving the internet for the past 25 years. We are the creators of pioneering brands such as Firefox, a privacy-focused web browser. With over 225 million monthly users worldwide, we are actively shaping the future of technology and advocating for an internet that prioritizes people over corporations. Our work spans diverse areas including AI, social media, and security, all while remaining committed to our core mission of making the internet a better place for everyone.

Mozilla Corporation is wholly owned by the 501(c) Mozilla Foundation. This unique structure frees us from shareholder obligations, allowing us to focus solely on our mission. In collaboration with thousands of global volunteers and contributors, Mozillians design, build, and distribute open-source software that empowers individuals to experience the internet on their own terms.

About this Team and Role

The Firefox Machine Learning team is focused on developing and scaling AI-powered features within Mozilla's flagship product. Our goal is to enhance the browser's intelligence, helpfulness, and user-centricity. As a Senior Manager on this team, you will lead the engineering and Machine Learning efforts to develop, train, and deploy Generative AI models and features directly into Firefox. You will play a pivotal role in shaping how millions of users interact with the web daily.

You will guide a team of highly skilled ML engineers who operate at the intersection of user experience, privacy, and innovative research, driving Mozilla's vision to make powerful AI accessible to everyone.

What You’ll Do

• Lead and grow a team of ML engineers focused on developing Generative AI models and integrating them into Firefox experiences.
• Drive end-to-end machine learning product development, encompassing research, prototyping, model training, evaluation, deployment, and production iteration.
• Collaborate cross-functionally with product, research, design, and platform teams to deliver user-facing features powered by proprietary and open-source AI models.
• Define technical strategy and execution plans for ML initiatives that align with Mozilla's mission and the Firefox product roadmap.
• Champion engineering excellence, inclusion, and a user-first perspective throughout all stages of feature development.

What You’ll Bring

• 10+ years of experience in machine learning, with a minimum of 5 years in technical management roles.
• 5+ years of experience building and deploying ML or Generative AI systems in production environments, including hands-on experience with LLMs, transformers, or multimodal models.
• A proven track record of managing high-performing engineering teams that have successfully shipped AI features to millions of users.
• Deep expertise in modern ML development frameworks (e.g., PyTorch, TensorFlow), scalable training/inference infrastructure, and MLOps practices.
• Experience with on-device machine learning model development and deployment is a strong plus.
• Familiarity with privacy-preserving ML techniques, such as differential privacy or federated learning, is a plus.
• A Master's degree or Ph.D. in Computer Science, Machine Learning, or a related field (or equivalent industry experience).
• Strong communication skills, with the ability to translate complex technical concepts into actionable plans for cross-functional collaborators.

Commitment to Our Values

• Welcoming differences: Foster an inclusive and equitable team environment.
• Being relationship-minded: Build trusting partnerships across Mozilla and the broader community.
• Practicing responsible participation: Promote ethical and privacy-aware use of AI.
• Having grit: Lead through ambiguity and pursue impactful goals with persistence and creativity.

What You’ll Get

• Generous performance-based bonus plans for all eligible employees, reflecting our shared success as one team.
• Comprehensive medical, dental, and vision coverage.
• Generous retirement contributions with 100% immediate vesting, irrespective of employee contributions.
• Quarterly all-hands meetings and company updates.