Principal Machine Learning Engineer, Ads Modeling

Unity Technologies SF is looking for a Principal Machine Learning Engineer to help advance Unity Vector Ads Modeling, building better ads recommendation algorithms that power personalized ad experiences. This onsite role in Mountain View, CA combines research depth with engineering impact, supported by a benefits package designed for long-term wellbeing and growth. The salary range for this position is $222,600 to $325,400 per year (Zone A/B/C depending on location and qualifications).

What you’ll work on

In this role, you’ll shape the modeling roadmap around customer needs and move promising approaches from foundational research into production with close collaboration across engineering and product. You’ll use rich user data and large-scale compute to validate models quickly, while helping ensure that the work connects to measurable outcomes.

• Identify opportunities and design a modeling roadmap that addresses customer needs
• Drive foundational research for new models and modeling paradigms
• Leverage rich user data and large-scale compute to validate models rapidly
• Collaborate with engineering and product teams to productionalize research

What you bring

• Hands-on experience applying state-of-the-art machine learning and deep learning to complex real-world problems, specifically user behavior modeling
• Proficiency in Python and PyTorch, along with deep learning frameworks
• Solid understanding of metric design, large-scale data analysis, and distributed computing frameworks
• Proven ability to drive projects end-to-end, including solving critical cross-team problems and delivering measurable business results

Tools and technologies

Python, PyTorch

Benefits

• Comprehensive health, life, and disability insurance
• Commute subsidy
• Employee stock ownership
• Competitive retirement/pension plans
• Generous vacation and personal days
• Support for new parents through leave and family-care programs
• Office food snacks
• Mental Health and Wellbeing programs and support
• Employee Resource Groups
• Global Employee Assistance Program
• Training and development programs
• Volunteering and donation matching program

Compensation ranges (gross annual salary)

• Zone A: $250,300 - $325,400 USD
• Zone B: $222,600 - $289,400 USD
• Zone C: $197,400 - $256,600 USD