Job Description: Senior Manager, Firefox Machine Learning

Why Mozilla?

Mozilla Corporation, supported by a non-profit organization, has been a driving force in shaping the internet for the better over the past 25 years. We are the creators of pioneering brands like Firefox, the privacy-focused web browser. With over 225 million monthly users worldwide, we are actively shaping the next 25 years of technology, dedicated to reclaiming an internet built for people, not corporations. Our work spans diverse areas including AI, social media, and security, all while remaining committed to our core mission of improving the internet for everyone.

Mozilla Corporation is entirely owned by the non-profit 501(c) Mozilla Foundation. This unique structure means we are not accountable to shareholders, but solely to our mission. In collaboration with thousands of global volunteer contributors, Mozillians design, build, and distribute open-source software, empowering individuals to experience the internet on their own terms.

About this Team and Role

The Firefox Machine Learning team is focused on building and scaling AI-powered features within Mozilla's flagship product. Our goal is to make the browser smarter, more helpful, and more human-centered. As a Senior Manager on this team, you will lead the engineering and ML efforts to develop, train, and deploy Generative AI models and features directly into Firefox. This role will significantly influence 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 of making powerful AI accessible to all.

What You'll Do

• Lead and Grow Team: Lead and mentor a team of ML engineers focused on developing Generative AI models and integrating them into Firefox experiences.
• Drive End-to-End ML Development: Oversee the complete machine learning product development lifecycle, from research and prototyping to model training, evaluation, deployment, and ongoing iteration in production.
• Cross-Functional Collaboration: Partner effectively with product, research, design, and platform teams to deliver user-facing features powered by both proprietary and open-source AI models.
• Define Technical Strategy: Establish the technical strategy and execution plans for ML initiatives, ensuring alignment with Mozilla's mission and the Firefox product roadmap.
• Champion Excellence: Promote engineering excellence, foster an inclusive environment, and maintain a user-first perspective throughout all stages of feature development.

What You'll Bring

• Experience:
  • 10+ years of experience in machine learning.
  • 5+ years of experience in technical management roles.
  • 5+ years of experience building and deploying ML or Generative AI systems in production environments, including experience with LLMs, transformers, or multimodal models.
  • Proven track record of managing high-performing engineering teams that have shipped AI features to millions of users.
• Technical Expertise:
  • Deep expertise in modern ML development frameworks (e.g., PyTorch, TensorFlow).
  • Proficiency in 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.
• Education:
  • Master's degree or Ph.D. in Computer Science, Machine Learning, or a related field (or equivalent industry experience).
• Skills:
  • Strong communication skills, with the ability to translate complex technical concepts into collaborative plans with 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

• Performance-Based Bonuses: Generous performance-based bonus plans for all eligible employees, reflecting our shared success.
• Comprehensive Benefits: Rich medical, dental, and vision coverage.
• Retirement Contributions: Generous retirement contributions with 100% immediate vesting, irrespective of personal contributions.
• Quarterly All-Hands: Participation in quarterly all-hands meetings.