Applied Scientist, Vector AI

The opportunity Unity's Vector AI team sits at the intersection of large-scale machine learning and real-world impact: our models govern ad ranking and bidding decisions across billions of daily impressions. Get the models right so players can discover games they love. We're looking for an Applied Scientist with experience on user understanding, sequence modeling, and/or conversion prediction. What you'll be doing Design and ship user behavior models that directly influence ad ranking, bidding, and conversion outcomes across billions of impressions. Own model quality from deployment onward: calibration, drift detection, and feedback loop management. Shape how the team builds, contributing to long-term technical strategy and overseeing engineering execution. Bridge the gap between ML complexity and business reality, communicating clearly with non-technical partners. What we're looking for Master or Ph.D. in Computer Science, Machine Learning, Statistics, related fields, or equivalent practical experience. 2+ years of hands-on experience designing, building, and operating ML systems at scale in ads, search, recommendations, or related domains. Deep familiarity with at least one of: CVR/CTR prediction, auction theory, user modeling, or sequential recommendation. Production experience in Python and at least one systems language (Go, Scala, C++, or similar). 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. Experience embracing AI as a strategic advantage in engineering, following established best practices for code quality and security. You might also have Experience with real-time bidding systems, auction dynamics, or marketplace optimization. Publications or patents in relevant areas. Additional information Relocation support is not available for this position Work visa/immigration sponsorship is not available for this position 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. 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. #SEN #LI-AR1 *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 $100,800—$159,600 USD