Roblox · 1 week ago
[2026] Senior Machine Learning Engineer, AI Platform - PhD Early Career
San Mateo, CA
Full-time
Hybrid
Senior Level
$196K/yr - $242K/yrRoblox is a platform where millions of people explore, create, and connect in 3D immersive digital experiences. They are seeking a Senior Machine Learning Engineer for their AI Platform team to contribute to building cutting-edge systems that power AI, focusing on AI tooling, distributed inference systems, and generative AI information retrieval.
3D TechnologyGamingMetaverseOnline GamesSoftwareVideo Games
Responsibilities
Pioneer next-generation AI tooling to enhance the efficiency, cost, and usability of ML@Roblox
Build and maintain core platform components: Serving Layer, Model Registry, Pipeline Orchestrator, and Training/Inference control planes
Design great developer experiences (paved-road templates, tooling, visualizations) to reduce time-to-production and ensure foundational AI systems are scalable and reliable
Architect and implement scalable distributed inference systems for efficiently serving LLMs and Large Recommender Models at massive scale
Conduct deep, low-level performance analysis and optimize ML models (using techniques like continuous batching, speculative decoding, and quantization) and systems on GPU architectures to maintain peak performance and stability
Lead the design and development of Retrieval-Augmented Generation (RAG) systems
Build and maintain core information retrieval infrastructure—vector databases and knowledge graphs—to enable accurate grounding of Gen AI models
Ship language models and 3D objects as a service for the Roblox community, making creation easier
Qualification
Required
Possessing or pursuing a Ph.D. in Computer Science, Computer Engineering, Mathematics, Statistics, or a related technical field, with a thesis aligned to Roblox's research areas
Experience with high performance distributed systems, ML Infrastructure, LLM fine tuning/RL, Information Retrieval and Gen AI context generation
Expertise in one or more of the following key areas: AI/ML Platform Data stores - Features stores, Vector DBs and Knowledge Graphs
Expertise in LLMs - Fine tuning, Safety
Expertise in Agentic systems - Agent evaluation, context engineering
Experience building agentic applications with context for real world applications
Collaborative mindset and experience integrating and deploying optimized models with cross-functional teams, including data scientists and software engineers
Experience with graph databases and large-scale GNNs (Graph Neural Networks)
Experience working with Kubernetes
Experience working with one or more cloud providers (e.g., AWS, Azure, GCP)
Experience working with high availability systems
Experience working with ML models, LLMs or other AI systems
Benefits
Equity compensation
Benefits as described on this page
Company
Roblox
Roblox is an online gaming and entertainment platform that offers a shared digital experience that brings people together through play.
Founded in 2004
1001-5000 employees
H1B Sponsorship
Roblox has a track record of offering H1B sponsorships. Please note that this does not
guarantee sponsorship for this specific role. Below presents additional info for your
reference. (Data Powered by US Department of Labor)
Distribution of Different Job Fields Receiving Sponsorship
Represents job field similar to this job
Trends of Total Sponsorships
2025 (240)
2024 (111)
2023 (139)
2022 (153)
2021 (91)
2020 (92)
Funding
Current Stage
Public CompanyTotal Funding
$874.45MKey Investors
Andreessen HorowitzAltos Ventures
2024-10-01Post Ipo Equity
2022-04-12Series Unknown· $17.71M
2021-08-11Series Unknown
Leadership Team
David Baszucki
Founder and CEO
Michael Guthrie
CFO
Recent News
2026-01-09
2026-01-09
BiometricUpdate.com
2026-01-09
Company data provided by crunchbase