Senior Machine Learning Engineering Manager

Summary

Join Mozilla's Firefox Machine Learning team as a Senior Manager to lead engineering and ML efforts in developing, training, and shipping Generative AI models and features integrated into Firefox. You will guide a team of skilled ML engineers, collaborating with cross-functional teams to deliver user-facing features. This role requires defining technical strategies and execution plans aligned with Mozilla's mission and Firefox's product roadmap. You will champion engineering excellence, inclusion, and a user-first perspective. The ideal candidate will have extensive experience in machine learning and technical management, a proven track record of success, and deep expertise in modern ML development frameworks. This position offers a chance to make a significant impact on the way millions of users interact with the web.

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)