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Principal Model Optimization Engineer

San Mateo, CA💼 Full-time💰 $295,250–$295,250🗓 2026-07-15 → 2026-07-31

Core

Optimizing machine learning models for performance on GPU architectures across training and inference workflows for Roblox's ML Platform.

Role type

Principal Model Optimization Engineer

Builds

High-performance ML inference and training pipelines for Roblox's Discovery, Safety, and Engine systems.

Domain

Internet / Machine Learning / GPU Systems

Deliverable

production ML models

Required skills

GPU debugging, CUDA, Triton, TensorRT, LLM optimization (speculative decoding, continuous batching, quantization), system design, low-level performance profiling

Preferred skills

Tooling development, cross-functional collaboration, performance advocacy

Technologies

CUDA, Triton, TensorRT

Responsibilities

Optimize ML models for GPU performance, conduct low-level profiling to identify bottlenecks, develop best practices and tooling for model optimization, integrate optimized models into production, build interfaces for ML platform usability

Seniority

Principal, hands-on IC

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