Principal Machine Learning Engineer, Ads Modeling

Unity; Bellevue (WA); On-site; USD 197,000 - 325,000; Full time

Benefits offered by this job

Health insurance

Employee stock ownership

Commuter subsidy

Retirement plans

Generous vacation and personal days

Parental leave support

Job summary

Unity is seeking a Principal Machine Learning Engineer to join the Vector Ads Modeling team in Bellevue, WA. You will advance ads recommendation algorithms using scalable ML techniques and collaborate with engineering and product teams to bring research into production.

The role emphasizes hands-on development in Python/PyTorch, large-scale data analysis, and delivering measurable business impact. Eligible for equity and incentive plans, with base salary in a broad range depending on location

Qualifications

• Hands-on experience applying state-of-the-art ML and deep learning models to real-world problems, especially user behavior modeling.
• Proficiency in Python and PyTorch.
• Strong understanding of metrics, data analysis and distributed computing.

Responsibilities

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

Skills

Python

PyTorch

Deep learning

Machine learning

User behavior modeling

Distributed computing

Model deployment

Job description

The Opportunity

Unity Vector represents the next generation of our AI-powered advertising ecosystem, a forward-looking evolution of our machine learning infrastructure and models.

We are seeking a Principal Machine Learning Engineer to join our Vector Ads Modeling team. In this role, you will work with a high-performing high-impact team to advance ads recommendation algorithms to deliver personalized ads experience.

What You’ll Be Doing

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

What We’re Looking For

• Expertise: Hands‑on experience applying state‑of‑the‑art machine learning and deep learning models to complex real‑world problems, specifically in the domains of user behavior modeling. Proficiency in Python, Pytorch and deep learning frameworks.
• Data & Analytics: Solid understanding of metric design, large-scale data analysis, and distributed computing frameworks.
• Strategic Impact: Proven ability to drive projects end-to-end, solving critical cross‑team problems and delivering measurable business results.

Additional Information

Gross Annual Salary: $197,400 - $325,400 USD

This range reflects the anticipated base salary for this position. Beyond base salary, this role may be eligible for equity awards and participation in our company incentive plans (such as annual discretionary bonuses or sales commissions). The final offer amount will depend on several factors, including geographic location and the candidate’s relevant experience, professional background, and skill set.

Benefits

At Unity, we want our team members to thrive. We offer a wide range of benefits designed to support well‑being and work‑life balance.

Please note: Benefits eligibility, specific offerings, and coverage vary based on the country and employment status.

While specific benefits vary, here are some of the ways we strive to take care of our eligible team members globally:

• 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

Life at Unity

Unity [NYSE: U] is the world’s leading game engine, powering play for more than 3 billion consumers each month. The top mobile games in the world, the most played PC indie titles, the most innovative console games, and virtually all of the top XR and Web Games are developed, deployed, and grown in Unity. Unity also enables teams across industries like automotive, manufacturing, and healthcare to design, simulate, and collaborate in 3D — closing the gap between ideas and reality. For more information, please visit www.unity.com.

Unity is a proud equal opportunity employer. We are committed to fostering an inclusive, innovative environment and celebrate our employees across age, race, color, ancestry, national origin, religion, disability, sex, gender identity or expression, sexual orientation, or any other protected status in accordance with applicable law. Our differences are strengths that enable us to support the growing and evolving needs of our customers, partners, and collaborators.

If you have a disability that means there are preparations or accommodations we can make to help ensure you have a comfortable and positive interview experience, please fill out this form to let us know.

This position requires the incumbent to have a sufficient knowledge of English to have professional verbal and written exchanges in this language since the performance of the duties related to this position requires frequent and regular communication with colleagues and partners located worldwide and whose common language is English.