Senior ML Engineer: Real-Time AI & NPC Systems

Roblox Corporation; San Mateo (CA); Hybrid; USD 197,000 - 243,000; Full time

Job summary

Roblox Corporation in San Mateo, CA is seeking a Senior Machine Learning Engineer to help build the AI systems powering NPC behavior and real-time inference at scale.

You will design robust data pipelines, train novel architectures, and optimize deployment for tens to hundreds of autonomous NPCs across the Roblox universe. A PhD in a relevant field and hands-on experience with ML platforms and Kubernetes are highly valued.

Qualifications

• Ph.D. in CS/CE/Math/Stats or related field, with Roblox-aligned thesis.
• Built end-to-end ML pipelines and managed model inference.
• Experience with novel datasets and real-world agentic applications.
• Scaled high-performance, high-availability architectures.
• Handled infrastructure using Kubernetes and major cloud providers.

Responsibilities

• Design, build, and maintain robust data pipelines for 3D game states and real-time actions across the platform.
• Train novel architectures and speed up model training for NPCs in a scalable way.
• Engineer high-performance real-time inference for autonomous NPCs in live environments.

Skills

ML pipelines

Real-time inference

Model training

Distributed systems

Cloud knowledge

Education

PhD in CS/CE/Math/Stats

Tools

Kubernetes

AWS/Azure/GCP

Job description

Roblox Corporation in San Mateo, CA is seeking a Senior Machine Learning Engineer to help build the AI systems powering NPC behavior and real-time inference at scale.

You will design robust data pipelines, train novel architectures, and optimize deployment for tens to hundreds of autonomous NPCs across the Roblox universe. A PhD in a relevant field and hands-on experience with ML platforms and Kubernetes are highly valued.