Roblox is looking to redefine how users search and discover immersive experiences and digital avatars by enhancing their recommendation systems. This involves solving high-scale ranking, retrieval, and personalization problems to drive user retention, engagement, and monetization.
Requirements
- Expertise in one or more areas: recommender systems, search systems, information retrieval, or generative models (e.g., LLMs, VLMs, VLAs)
- Ability to design and architect systems for efficient personalization and user interest modeling using advanced attention mechanisms (e.g., sparse/linear attention).
- Proficiency in one or more programming languages (e.g., Python, C++, Go, Java) and experience building and optimizing large-scale systems.
- Deep learning
- Generative AI
- Reinforcement learning techniques
- Multimodal models
Responsibilities
- 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.
- Design algorithms that operate at massive scale and shape the next generation of recommender systems for user-generated content.
- Combine cutting-edge research —including deep learning, generative AI, and reinforcement learning techniques— with large-scale engineering to bridge experimentation and production.
Other
- Possessing or pursuing a PhD in computer science, engineering, or a related field, with a thesis aligned to Roblox’s research areas.
- A strong research track record, evidenced by multiple publications and presentations in top-tier, peer-reviewed venues (e.g., SIGIR, KDD, RecSys, ICLR, ICML, NeurIPS).
- You may redact age, date of birth, and dates of attendance/graduation from your resume if you prefer.
- Roblox provides equal employment opportunities to all employees and applicants for employment and prohibits discrimination and harassment of any type without regard to race, color, religion, age, sex, national origin, disability status, genetics, protected veteran status, sexual orientation, gender identity or expression, or any other characteristic protected by federal, state or local laws.
- Roblox also provides reasonable accommodations to candidates with qualifying disabilities or religious beliefs during the recruiting process.
