Principal Model Optimization Engineer

OneClick Smart Resume; San Mateo (CA); On-site; USD 295,000 - 345,000; Full time

Job summary

Roblox is seeking a Model Optimization Engineer on the ML Platform to optimize ML models for training and inference across GPU architectures. You will dig into model internals to optimize performance, for both training and inference, and help maximize platform efficiency.

Join a cross-functional team of data scientists and software engineers to deploy optimized models into production environments and contribute to tooling and workflows that make ML at Roblox fast, scalable, and reliable.

Qualifications

• 6+ years of professional experience building performant systems.
• Experience debugging GPUs and reading GPU profiles.
• Proficient with CUDA, Triton and TensorRT for model execution.
• Experience with optimization techniques for LLMs including quantization and batching.
• You are passionate about pushing GPU performance and generalizing tooling.

Responsibilities

• Optimize machine learning models for performance on GPUs in training and inference.
• Profile pipelines to identify bottlenecks and propose improvements.
• Develop best practices and tooling for model optimization and deployment.
• Collaborate with data scientists and software engineers to deliver production-ready models.
• Build user-friendly tooling and visualizations to improve ML workflows.

Skills

System design

Performance optimization

Cross-functional collaboration

Problem solving

Mentoring/leadership

Education

Bachelor's degree in Computer Science/Engineering/Data Science

Tools

CUDA

Triton

TensorRT

Job description

Job Description

Every day, tens of millions of people come to Roblox to explore, create, play, learn, and connect with friends in 3D immersive digital experiences– all created by our global community of developers and creators.

At Roblox, we’re building the tools and platform that empower our community to bring any experience that they can imagine to life. Our vision is to reimagine the way people come together, from anywhere in the world, and on any device. We’re on a mission to connect a billion people with optimism and civility, and looking for amazing talent to help us get there.

A career at Roblox means you’ll be working to shape the future of human interaction, solving unique technical challenges at scale, and helping to create safer, more civil shared experiences for everyone.

ML Platform @ Roblox today supports hundreds of ML use cases and billions of inferences per day across Discovery, Safety, Engine, and much more. As a Model Optimization engineer on ML Platform, you will be responsible for digging deep into model internals to optimize performance, for both training and inference. We are looking for accomplished engineers to help us maximize performance of our platform.

You Will

• Optimize machine learning models for performance on GPU architectures, focusing on both training and inference workflows.


• Conduct low-level performance profiling analysis to identify bottlenecks in existing machine learning pipelines and propose actionable improvements.


• Contribute to the development of best practices and tooling for model optimization and deployment.


• Collaborate with cross-functional teams, including data scientists and software engineers, to integrate and deploy optimized models into production environments.


• Partner across organizations to build tooling, interfaces, and visualizations that make the ML@Roblox a delight to use.

You Have

• 6+ years of professional experience and a tool chest of system design experience upon which to draw to build performant systems for all of Roblox.


• Have significant experience debugging GPUs - reading GPU profiles, debugging Xid errors, etc.


• Proficient in advanced tools and frameworks (e.g., CUDA, Triton, TensorRT) to enhance model execution speed and reduce latency.


• Experience with model optimization techniques for LLMs, such as speculative decoding, continuous batching, quantization, etc.


• A performance nut; you love pushing the limits of what’s possible, whether it’s squeezing every last ounce of efficiency from a GPU, fine‑tuning algorithms for peak speed, or innovating new techniques to enhance model performance


• A generalization advocate: you're passionate about building tools and frameworks that consistently deliver improvements in model performance.


• Passionate about supporting internal partners (data scientists and ML Engineers) to meet and understand their needs.


• A Bachelor's degree in Computer Science, Computer Engineering, Data Science, or a similar technical field.

Annual Salary Range

$295,250—$345,040 USD

Roles that are based in an office are onsite Tuesday, Wednesday, and Thursday, with optional presence on Monday and Friday (unless otherwise noted).

All full-time employees are also eligible for equity compensation and for benefits as described on this page.

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.

For US based roles only, please note the Company may not be able to employ candidates for this role who have United States work authorization related to certain U.S. visa categories, or support future H-1B sponsorship at this time.