[2026] Machine Learning Engineer, Recommendation Systems PhD Intern

Every day tens of millions of people come to Roblox to explore create play learn and connect with friends in 3D immersive digital experiences all created by our global community of developers and creators.

At Roblox were building the tools and platform that empower our community to bring any experience that they can imagine to life. Our vision is to reimagine the way people come together from anywhere in the world and on any device. Were on a mission to connect a billion people with optimism and civility and looking for amazing talent to help us get there.

A career at Roblox means youll be working to shape the future of human interaction solving unique technical challenges at scale and helping to create safer more civil shared experiences for everyone.

Roblox is ushering in the next generation of entertainment allowing people to create and play together in immersive user-generated worlds. Were 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!

Robloxs platform is experiencing unprecedented growth and as a PhD Intern you will be at the forefront of this exciting journey! Youll 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 well 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. Were looking for experts to focus on the following areas:

• Search and Discovery: powers major recommendation surfacesconducting 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 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.