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# Principal/Senior Machine Learning Scientist - Search and Discovery

- **Company:** Roblox
- **Location:** San Mateo, CA, United States
- **Experience:** Expert
- **Salary:** $278,530.0 - $345,040.0
- **Contract:** Permanent contract
- **Skills:** Machine Learning, Large Language Models, Information Technology, Roblox
- **Published:** October 26, 2026
- **Apply:** https://www.adzuna.com/details/5696483104

## About the Role

* You have 7+ (for principal) or 4+ (for senior) years of experience designing and building scalable machine learning solutions. Experienced with transformer based model training, inference, and product integration. Break down product requirements into iterative deliverable stages.
 * Depth in recommendation, search retrieval and ranking, or LLM post-training and agentic systems is a plus.
 * You have a BS, MS, or PhD in Computer Science or a related discipline or equivalent experience.
 * You have initiated and facilitated 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. You bring in fresh ideas from new places.