Staff Machine Learning Engineer, User Understanding

San Francisco, CA - USA

Monthly Salary: Not Disclosed

Posted on: 08-11-2025

Vacancies: 1 Vacancy

Job Summary

The opportunity
At Unity were committed to building a culture that fosters collaboration and innovation. Within our fast-paced environment were tackling complex challenges that drive meaningful impact for creators and users across our ecosystem.

Our Foundation Modeling team plays a central role in this effort by developing state-of-the-art conversion rate (CVR) prediction and market price models that power our ad ranking and recommendation systems. By leveraging large-scale data and contextual signals we continuously enhance prediction relevance and accuracy. This drives outcomes such as higher user engagement stronger conversion performance and better return on ad spendhelping advertisers achieve their goals while delivering a more engaging experience for users.

We are seeking a highly skilled Staff ML Engineer to build and maintain advanced systems for understanding user behavior across applications. You will be responsible for improving ad ranking conversion predictions and recommendation systems enabling richer behavioral models smarter bidding strategies and more effective ad performance.

What youll be doing

Design implement and maintain user understanding models.
Ensure model quality and reliability by continuously monitoring performance calibrating predictions and addressing data drift or delayed feedback.
Actively participate and work with other leads to set the long-term direction for the team plan and oversee engineering designs and project execution.
Effectively communicate complex technical concepts to non-engineering stakeholders.

What were looking for

Advanced degree (MS or Ph.D.) in Computer Science Machine Learning Statistics related field or equivalent practical experience.
5 years of hands-on experience building and operating large-scale Ads delivery and optimization systems.
3 years of experience in content understanding behavior modeling user profiling and cohort analysis.
Significant experience in one or more general-purpose programming languages like Python Go Scala C or similar.
Knowledge of metric design experimentation methodologies and large-scale data analysis.

You might also have

Experience designing and productionizing optimization algorithms in an ad serving platform and/or other marketplaces.
Experience with state-of-the-art control systems reinforcement learning algorithms.

Life at Unity
We offer a wide range of benefits designed to support employees well-being and work-life balance. You can read more about them on our career page.

Unity NYSE: U is the leading platform to create and grow games and interactive experiences. Creators ranging from game developers to artists architects automotive designers infrastructure experts filmmakers and more use Unity to bring their imaginations to life across multiple platforms from mobile PC and console to spatial computing.

As of the third quarter of 2024 more than 70% of the top 1000 mobile games were made with Unity and in 2024 Made with Unity applications had an average of 3.7 billion downloads per month. For more information please visit Unity.

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.

Pursuant to the San Francisco Fair Chance Ordinance we will consider for employment qualified applicants with arrest and conviction records.

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.

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Required Experience:

Staff IC

The opportunityAt Unity were committed to building a culture that fosters collaboration and innovation. Within our fast-paced environment were tackling complex challenges that drive meaningful impact for creators and users across our ecosystem.Our Foundation Modeling team plays a central role in thi...