Principal/Senior Machine Learning Scientist - Search and Discovery

At Roblox, we’re 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. We’re on a mission to connect a billion people with optimism and civility, and looking for amazing talent to help us get there. With Roblox’s daily active users growing at a record pace, we are seeking experienced machine learning researchers who thrive on solving complex challenges and designing scalable, ground breaking solutions. In this role, you will innovate on LLMs, VLMs, autoregressive models, or other large models for user understanding, content understanding, recommendation, and agentic search. Your work will lay the foundation for personalizing user experiences, enhancing engagement and retention, and driving growth within the creator ecosystem.

Design and implement the machine learning solutions that power agentic search and discovery systems to drive Roblox content distribution.

Design and implement large scale recommendation models.

Design and implement LLMs and VLMs for visual understanding and natural language understanding.

Balance researching new technologies with a practical approach to integrate research efforts into the Roblox products.

Collaborate with other teams within Roblox to make sure we are building products with a community first approach.

Communicate with the industry and communities where applicable and be ambassador for Roblox.