> Markdown version of [/jobs/ext/3407656-senior-applied-scientist-ads-personalization](https://www.wearedevelopers.com/jobs/ext/3407656-senior-applied-scientist-ads-personalization). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior Applied Scientist, Ads Personalization - **Company:** Unity Technologies - **Location:** Mountain View, CA, United States - **Experience:** Expert - **Salary:** $148,700.0 - $244,600.0 - **Contract:** Permanent contract - **Skills:** Artificial Intelligence, Big Data, C++ (Programming Language), Content Analysis, Python (Programming Language), Machine Learning, Recommender Systems, Reinforcement Learning, Information Technology, Optimization Algorithms - **Published:** September 21, 2026 - **Apply:** https://www.indeed.com/viewjob?jk=2201267883cd9bff ## About the Role * 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. ## Description At Unity, we're committed to building a culture that fosters collaboration and innovation. Within our fast-paced environment, we're tackling complex challenges that drive meaningful impact for creators and users across our ecosystem. Our Gamer AI 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 spend, helping advertisers achieve their goals while delivering a more engaging experience for users. We are seeking a highly skilled Senior Applied Scientist 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 you'll 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., 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. This posting is intended to fill an existing vacancy, and we are committed to providing applicants with updates throughout the hiring process in accordance with applicable law. 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. ## Related Videos - [Data Science in Retail](https://www.wearedevelopers.com/videos/586-data-science-in-retail) - [Alibaba Big Data and Machine Learning Technology](https://www.wearedevelopers.com/videos/37-alibaba-big-data-and-machine-learning-technology) - [ChatGPT vs Google: SEO in the Age of AI Search - Eric Enge](https://www.wearedevelopers.com/videos/1287-chatgpt-vs-google-seo-in-the-age-of-ai-search-eric-enge) - [Introduction to Azure Machine Learning](https://www.wearedevelopers.com/videos/368-introduction-to-azure-machine-learning) - [Inside the AI Revolution: How Microsoft is Empowering the World to Achieve More](https://www.wearedevelopers.com/videos/869-inside-the-ai-revolution-how-microsoft-is-empowering-the-world-to-achieve-more) - [Shoot for the moon - machine learning for automated online ad detection](https://www.wearedevelopers.com/videos/502-shoot-for-the-moon-machine-learning-for-automated-online-ad-detection) ## Related Articles - [How to Become an AI Engineer](https://www.wearedevelopers.com/magazine/331-how-to-become-an-ai-engineer) - [How to start an AI project for a good cause and boost your career](https://www.wearedevelopers.com/magazine/15-how-to-start-an-ai-project-for-a-good-cause-and-boost-your-career) - [Navigating the AI Shift](https://www.wearedevelopers.com/magazine/629-navigating-the-ai-shift) - [What Industries Outside of AI Are Hiring The Most AI Experts?](https://www.wearedevelopers.com/magazine/98-what-industries-outside-of-ai-are-hiring-the-most-ai-experts) - [Got AI ideas but no money? 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