[2025] Senior Machine Learning Engineer, Marketplace - PhD New Grad

The Marketplace team at Roblox is reimagining how the Roblox community discovers, interacts with, and personalizes avatar content. From search and recommendation systems to cutting-edge models for understanding text and visual content, our mission is to drive discovery and personalization for avatar bodies, clothing, accessories, outfits, and beyond. Our work impacts both users and creators, ensuring that the Marketplace serves the diverse needs of the Roblox ecosystem.

The focus areas for this team include:  recommender systems, search systems, personalization, multimodal models, content understanding, and computer vision.

You Will:

• Build end-to-end machine learning solutions for search, recommendation, and content understanding by working backward from product needs.
• Design, implement, and optimize deep learning models that drive discovery and personalization across the Marketplace.
• Explore novel modeling approaches for ranking, retrieval, multimodal content understanding, and query understanding.
• Develop robust and scalable production systems to serve high-scale search and recommendation requests.

You Have:

• Possess or pursuing a Ph.D. in Computer Science, Computer Engineering, Data Science, or a similar technical degree.
• Proficiency in one or more programming languages such as Go, Node.js, Ruby, Python, C++, Lua, Swift, C#, or Java
• Expertise in areas such as recommender systems, search technologies, personalization strategies, or advanced content understanding techniques
• Experience with state-of-the-art techniques in deep learning, including LLMs, multimodal models, NLP, or computer vision.
• Excel at building and working on end-to-end ML systems, from data analysis and ML modeling to production pipelines.
• Published and presented peer-reviewed articles in top-tier venues.