Roblox is seeking a Principal/Senior Machine Learning Scientist to innovate on large models for search, discovery, and personalization. You will lay the foundation for personalizing user experiences and enhancing engagement within our creator ecosystem, contributing to core systems that help users discover and interact with experiences.
What You'll Do
- Design and implement 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 Roblox products.
- Collaborate with other teams within Roblox to ensure we are building products with a community-first approach.
- Communicate with the industry and communities where applicable and be an ambassador for Roblox.
What We're Looking For
- 7+ years (for principal) or 4+ years (for senior) of experience designing and building scalable machine learning solutions.
- Experience with transformer-based model training, inference, and product integration.
- Ability to break down product requirements into iterative deliverable stages.
- BS, MS, or PhD in Computer Science or a related discipline, or equivalent experience.
- Demonstrated ability to initiate and facilitate challenging technical decisions across multiple teams and organizations.
- While deeply technical, you always start with the needs of the user, whether they are Roblox users or internal engineers.
- A creative and strategic approach to solving hard problems. You simplify the complex and bring in fresh ideas from new places.
Benefits & Compensation
- Salary range: $278,530 — $345,040 USD
- Eligible for equity compensation
Work Mode
This is a hybrid position based in San Mateo, CA.
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.




