Senior/Principal Machine Learning Engineer (3D Data)

Location: San Mateo, California, United States; office-based roles require onsite work Tuesday, Wednesday, and Thursday, with optional presence on Monday and Friday.

Salary: $243,290–$295,250 USD annual base pay, plus equity compensation and benefits.

Company

Roblox builds a platform and tools for creating, exploring, and sharing 3D immersive digital experiences.

What you will do

• Architect and maintain automated pipelines for ingesting, cleaning, preprocessing, and serving petabyte-scale video and 3D datasets.
• Generate large multimodal synthetic datasets using image and video generation models.
• Partner with AI researchers to turn experimental data workflows into scalable production infrastructure.
• Build evaluation frameworks combining heuristic metrics with human-in-the-loop interfaces for datasets and foundation models.
• Design high-throughput, low-latency inference APIs and monitor pipeline health and GPU utilization.
• Track generative modeling research and implement relevant performance optimizations.

Requirements

• 8+ years of experience as a research-focused data systems engineer, preferably with 3D and video foundation models.
• Experience building scalable batch and real-time ML data pipelines and processing petabyte-scale datasets.
• Strong Python skills and experience with cloud data platforms and distributed technologies such as Spark, Ray, Kubeflow, and S3.
• Experience leading projects across team boundaries, mentoring peers, and delivering high-quality, well-tested infrastructure.
• Bachelor’s degree or equivalent experience in Computer Science, Computer Engineering, or a related technical field.
• For US-based roles, candidates must have appropriate US work authorization; future H-1B sponsorship may not be supported.

Nice to have

• Experience with experiment tracking and massive dataset versioning using Weights & Biases or MLflow.
• Experience building human-in-the-loop labeling tools for video or 3D data.
• C++ knowledge for optimizing data loaders and modifying engine code.
• Experience with Roblox game development, Blender, Unreal Engine, or Unity.

Culture & Benefits

• Work on foundation AI systems supporting creative 3D and 4D content generation.
• Collaborate directly with AI research teams on infrastructure used at large scale.
• Full-time employees are eligible for equity compensation and company benefits.
• Equal employment opportunities and reasonable accommodations are provided during the recruiting process.