Principal Machine Learning Engineer

55 Minutes ago • All levels • $239,100 PA - $323,400 PA

Job Summary

Job Description

The Principal Machine Learning Engineer will lead the development and deployment of machine learning models for Unity Ads, optimizing ad delivery, bidding strategies, and user engagement. They will architect scalable systems, drive technical direction, translate research into practical solutions, and collaborate with cross-functional teams to align ML capabilities with business goals. Responsibilities include experimental design, model tuning, defining data infrastructure, and promoting best practices. The role requires strong analytical skills and the ability to communicate technical concepts.
Must have:
  • Advanced degree in Computer Science, Machine Learning, etc.
  • Experience delivering impactful ML solutions in production.
  • Deep expertise in machine learning frameworks and tools.
  • Strong analytical and problem-solving skills.

Job Details

The opportunity
At Unity, we’re committed to building a culture grounded in Empathy, Respect, and Opportunity. Within our fast-paced and collaborative environment, we’re tackling complex challenges that drive meaningful impact for creators and users across our ecosystem. Our Ads Applied Research team plays a crucial role in shaping the future of Unity’s monetization products through cutting-edge machine learning and optimization strategies.

We are seeking a Principal Machine Learning Engineer to help define and implement the next generation of ML systems for Unity Ads. In this senior role, you will lead the design, development, and deployment of machine learning models that power our ad network, marketplace, and audience targeting tools. You’ll also play a key role in shaping our overall ML strategy, collaborating closely with product, engineering, and research teams.

What you'll be doing

  • Architect and deploy scalable, production-grade machine learning systems to optimize ad delivery, bidding strategies, and user engagement.
  • Drive the technical direction of ML initiatives—identifying key opportunities, defining roadmaps, and mentoring team members across disciplines.
  • Translate state-of-the-art research into practical solutions, ensuring Unity remains at the forefront of ML performance and innovation in the ad tech space.
  • Partner cross-functionally with data science, product, and engineering teams to align ML capabilities with strategic business goals.
  • Lead experimental design, performance evaluation, and model tuning for high-impact use cases.
  • Define requirements for data infrastructure, tooling, and processes to support advanced ML initiatives.
  • Promote best practices for model development, testing, deployment, and monitoring.

What we're looking for

  • Advanced degree (Ph.D. preferred) in Computer Science, Machine Learning, Statistics, or a related field—or equivalent practical experience.
  • Proven track record of delivering impactful ML solutions in production, particularly in large-scale, high-throughput systems (e.g., ad tech, recommendation systems, marketplaces).
  • Deep expertise in machine learning frameworks and tools (e.g., PyTorch, TensorFlow, etc.) and a strong understanding of modern model architectures.
  • Strong analytical and problem-solving skills, with the ability to formulate and validate complex hypotheses using large datasets.
  • Excellent communication skills, capable of articulating technical concepts to both technical and non-technical audiences.
  • Experience leading ML initiatives and mentoring other engineers or researchers.
  • Familiarity with data pipelines, model ops, and cloud ML deployment

Additional information

  • International relocation support is not available for this position.

Life at Unity
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 1,000 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 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.

Headhunters and recruitment agencies may not submit resumes/CVs through this website or directly to managers. Unity does not accept unsolicited headhunter and agency resumes. Unity will not pay fees to any third-party agency or company that does not have a signed agreement with Unity.

Your privacy is important to us. Please take a moment to review our Prospect Privacy Policy and Applicant Privacy Policy. Should you have any concerns about your privacy, please contact us at DPO@unity.com.

#DIR #LI-ED1

*Note: Certain locations require a good faith disclosure of the base salary range for the role. The actual salary for the successful candidate may differ based on location, experience, and other job-related factors.

Gross pay salary
$239,100$323,400 USD

Similar Jobs

Looks like we're out of matches

Set up an alert and we'll send you similar jobs the moment they appear!

Similar Skill Jobs

Looks like we're out of matches

Set up an alert and we'll send you similar jobs the moment they appear!

Jobs in Worldwide

Looks like we're out of matches

Set up an alert and we'll send you similar jobs the moment they appear!

Similar Category Jobs

Looks like we're out of matches

Set up an alert and we'll send you similar jobs the moment they appear!

About The Company

Unity (NYSE: U) is the world’s leading platform for creating and operating real-time 3D (RT3D) content. Creators, ranging from game developers to artists, architects, automotive designers, filmmakers, and others, use Unity to make their imaginations come to life. Unity is the foundation upon which the world’s most powerful digital content is created. Specifically, Unity’s platform provides a comprehensive set of software solutions to create, run and monetize interactive, real-time 2D and 3D content for mobile phones, tablets, PCs, consoles, and augmented and virtual reality devices. 

In the fourth quarter of 2021, Unity had, on average, 3.9 billion monthly active end users who consumed content created or operated with its solutions. The applications developed by these creators were downloaded, on average, five billion times per month in 2021. For more information, please visit www.unity.com. 


Download Unity: http://unity3d.com/get-unity

We're hiring! Visit our careers site: https://careers.unity.com

For support, please email: support@unity3d.com


Check us out on our other social channels: 

Twitter: https://twitter.com/unity

Facebook: https://www.facebook.com/unity3d/

Instagram: https://www.instagram.com/unitytechnologies/

San Francisco, California, United States (On-Site)

Tel Aviv-Yafo, Tel Aviv District, Israel (On-Site)

Seoul, South Korea (On-Site)

Brighton And Hove, England, United Kingdom (On-Site)

Tel Aviv-Yafo, Tel Aviv District, Israel (On-Site)

Tel Aviv-Yafo, Tel Aviv District, Israel (On-Site)

Brighton And Hove, England, United Kingdom (On-Site)

Tel Aviv-Yafo, Tel Aviv District, Israel (On-Site)

Tel Aviv-Yafo, Tel Aviv District, Israel (On-Site)

View All Jobs

Get notified when new jobs are added by Unity

Level Up Your Career in Game Development!

Transform Your Passion into Profession with Our Comprehensive Courses for Aspiring Game Developers.

Job Common Plug