Roblox is looking to solve the problem of empowering its community to bring any experience they can imagine to life, by building the tools and platform that support the creation of 3D immersive digital experiences, and establishing Roblox as the standard for 3D foundational models (3DFMs)
Requirements
- 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 one or more of the following key areas: LLMs - Fine tuning, Safety
- Expertise in one or more of the following key areas: Agentic systems - Agent evaluation, context engineering
- Experience building agentic applications with context for real world applications
- Experience with graph databases and large-scale GNNs (Graph Neural Networks)
- Experience working with Kubernetes
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
Other
- 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
- Collaborative mindset and experience integrating and deploying optimized models with cross-functional teams, including data scientists and software engineers
- Roles that are based in an office are onsite Tuesday, Wednesday, and Thursday, with optional presence on Monday and Friday (unless otherwise noted)
- 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
