Senior Machine Learning Engineering Manager

Summary

Join the Firefox Machine Learning team at Mozilla and lead the engineering and ML efforts to develop, train, and ship Generative AI models and features integrated into Firefox. As a Senior Manager, you will guide a team of skilled ML engineers, driving Mozilla’s vision for accessible AI. You will lead the team in developing Generative AI models and integrating them into Firefox, driving end-to-end machine learning product development. Collaboration with cross-functional teams is crucial to deliver user-facing features. You will define technical strategies and champion engineering excellence, inclusion, and a user-first perspective. This role requires extensive experience in machine learning, technical management, and AI system deployment.

Requirements

• 10+ years of experience in machine learning, with 5+ years 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 in shipping AI features to millions of users
• Deep expertise in modern ML development frameworks (e.g., PyTorch, TensorFlow), scalable training/inference infrastructure, and MLOps practices
• 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 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

Responsibilities

• Lead and grow a team of ML engineers developing Generative AI models and integrating them into Firefox experiences
• Drive end-to-end machine learning product development—from research and prototyping to model training, evaluation, deployment, and iteration in production
• 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 aligned with Mozilla’s mission and Firefox’s product roadmap
• Champion engineering excellence, inclusion, and a user-first perspective in every phase of feature development

Preferred Qualifications

• 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

Benefits

• Generous performance-based bonus plans to all eligible employees - we share in our success as one team
• Rich medical, dental, and vision coverage
• Generous retirement contributions with 100% immediate vesting (regardless of whether you contribute)
• Quarterly all-company wellness days where everyone takes a pause together
• Country-specific holidays plus a day off for your birthday
• One-time home office stipend
• Annual professional development budget
• Quarterly well-being stipend
• Considerable paid parental leave
• Employee referral bonus program
• Other benefits (life/AD&D, disability, EAP, etc. varies by country)