Unity Principal Machine Learning Engineer 

United States, Oregon 

853369384

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.

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.

Gross pay salary$239,100—$323,400 USD