SeniorPrincipal AI Platform Engineer - Feature Store Infrastructure

Power the Future of AI at Roblox!

Join the AI Platform team at Roblox where we are building the infrastructure that enables worldclass AI/ML experiences. Our mission is to empower developers and creators by providing scalable highperformance systems that drive AI innovation at an unprecedented scale.

As an AI Platform Engineer specializing in Knowledge Graphs and Feature Store Infrastructure you will design and build nextgeneration ML data infrastructure enabling AI applications across recommendations search safety content generation fraud detection and more. Your work will directly impact millions of users supporting AIdriven experiences across the entire Roblox ecosystem.

Why This Role

• Massive Impact: Your contributions will support billions of daily interactions powering AIdriven experiences across gaming learning social connections and digital creativity.
• EndtoEnd Ownership: Be a key architect in defining and building Robloxs Knowledge Graphs and Feature Store infrastructure from the ground up.
• CuttingEdge Growth: Work at the intersection of AI/ML data engineering and distributed systems solving some of the most complex largescale challenges in the industry.

You will:

• Build a groundbreaking Knowledge Graph: Develop largescale graphbased infrastructure that connects millions of players thousands of developers and billions of assets unlocking AIpowered recommendations safety social insights and fraud detection.
• Develop a scalable Feature Store: Architect and implement a system that supports both batch and realtime feature computation storage and serving enabling lowlatency AI inference at scale.
• Engineer largescale ML data pipelines: Design optimize and maintain highthroughput streaming and batch ETL pipelines that ingest process and serve billions of records per day.
• Enable online and offline inference: Ensure realtime lowlatency feature access for AI inference while maintaining consistency and robustness for batch model training.
• Collaborate with crossfunctional AI teams: Partner with ML researchers data engineers and product teams to build the nextgen AI infrastructure that fuels innovation at Roblox.
• Research & innovate: Stay at the forefront of AI infrastructure by exploring the latest in VectorDBs Feature Stores Graph ML realtime AI serving and Ground Truth Data Labeling.

You have:

• 5 years of experience in AI/ML data infrastructure knowledge graphs feature stores.
• Expertise in building scalable ML data pipelines for both batch and realtime environments.
• Strong software engineering skills with experience in distributed computing frameworks (e.g. Spark Flink Ray) and realtime data systems (e.g. Kafka Redis DynamoDB).
• Deep knowledge of ML Feature Stores (e.g. Feast Tecton Vertex AI Feature Store) and embedding/vector search infrastructure.
• Familiarity with Knowledge Graphs and graphbased ML applications (e.g. Neo4j TigerGraph AWS Neptune).
• A Bachelors degree in Computer Science Engineering or a related field.

Why Roblox

• Be a pioneer: Shape the AI landscape at a company redefining online experiences.
• Think big: Work on systems with global reach and immense scale.
• Stay at the cutting edge: Leverage the latest tools and technologies in AI/ML infrastructure.
• Change the game: Your work will set the standard for whats possible in AI at scale.

Take the leap and help us redefine the future of AI at Roblox. Together well create experiences that connect billions and inspire the next generation of creators.

Required Experience:

Staff IC