Roblox is ushering in the next generation of entertainment, allowing people to create and play together in immersive, user-generated worlds. We're the one and only fastest-growing entertainment platform that lets anyone teach themselves how to code and publish any experience imaginable — across any device — reaching players across the globe every day!

Roblox's platform is experiencing unprecedented growth, and as a PhD Intern, you will be at the forefront of this exciting journey! You'll be part of a world-class team that is revolutionizing the entertainment industry and empowering millions of players worldwide. During this 12 or 16-week internship, we'll support you as you tackle the hardest problems in tech today – content understanding, ML based recommendation, distributed systems, real-time communication, 3D co-experience, extensive data processing, rendering, physics. Roblox offers the opportunity to conduct experiments at scale with millions of users globally, vast datasets, and cutting-edge client-server technologies. We're looking for experts to focus on the following areas:

• Search and Discovery: powers major recommendation surfaces—conducting cutting-edge research in generative modeling, multimodal and MLLM technologies, designing advanced agentic AI algorithms to solve business requirements while achieving technical breakthroughs.
• Ads & Brands: focuses on ranking, retrieval, and marketplace/auction theory to optimize sponsored content delivery.

You Will

• Engage with Roblox as part of your PhD thesis during the internship and beyond on a case-by-case basis
• Perform hands-on ML Engineering, develop prototypes, and conduct experiments to solve challenging problems.
• Transition and apply innovative ML breakthroughs into large scale production systems 

You Have

• Pursuing or recently completed a PhD in computer science, engineering, or a related field, with a thesis aligned to Roblox areas.
• Proficiency in one or more programming languages such as Go, Node.js, Ruby, Python, C++, Lua, Swift, C#, or Java
• Published and presented peer-reviewed articles in top-tier venues.
• Proficiency in coding, with experience building and optimizing large-scale systems.

You may redact age, date of birth, and dates of attendance/graduation from your resume if you prefer.