Recommendation Systems are a key growth lever at Roblox, driving retention, engagement, and monetization for hundreds of millions of users. This role offers the unique opportunity to redefine how users search and discover everything from the most interesting immersive experiences and digital avatars in our Marketplace to personalized advertising. You will solve a diverse range of high-scale ranking, retrieval, and personalization problems across our platform. We combine cutting-edge research —including deep learning, generative AI, and reinforcement learning techniques— with large-scale engineering to bridge experimentation and production; you'll design algorithms that operate at massive scale and shape the next generation of recommender systems for user-generated content.

Design and implement large-scale recommendation systems that power discovery across Roblox’s surfaces — experiences, avatars, and creator content.

Develop deep learning models for ranking, retrieval, and personalization using approaches in multimodal models, LLMs, and generative AI.

Collaborate with applied researchers, engineers, and product teams to advance experimentation and accelerate innovation.

Translate research into production systems that impact hundreds of millions of daily active users.

Work backward from user and product needs to deliver ML solutions that drive engagement, retention, and ecosystem growth.