Senior Machine Learning Engineer, Applied AI Modeling

• Skills: Natural Language Processing, Machine Learning, Web security, Generative AI, Large Language Models, C, Hugging Face, LangChain
• Experiences: Senior
• Employments: Full-time
• Benefits: Medical benefits, Birthday leave, Public holidays time off, Disability insurance, Employee referral program, Generous vacation, Life insurance, Paid time off, Wellness benefits, 401(k), Paid parental leave
• Locations: United States (Remote)

Description:

• Join Mozilla as a Senior Machine Learning Engineer focusing on applied AI and LLM-based applications.
• Develop user-facing experiences with Generative AI for the Firefox browser, collaborating with engineering, design, and product teams.

Requirements:

• 4+ years of experience in applied machine learning, particularly in natural language processing or generative AI.
• Hands-on experience with fine-tuning and evaluating large language models (LLMs) using modern tools.
• Strong understanding of prompt engineering, embedding-based retrieval, and evaluation strategies.
• Proven track record of building user-facing AI features with a focus on privacy and usability.
• Excellent communication skills and ability to collaborate with diverse teams.
• Commitment to Mozilla's values: welcoming differences, relationship-mindedness, responsible participation, and grit.

Benefits:

• Performance-based bonus plans and generous medical, dental, and vision coverage.
• 100% immediate vesting on retirement contributions and quarterly wellness days.
• Country-specific holidays plus a day off for your birthday and a one-time home office stipend.
• Annual professional development budget and considerable paid parental leave.