SeniorPrincipal AI Platform Engineer, Data

Join theAI Platform team at Roblox where our mission is to create a cutting-edge AI/ML platform that powers some of the most innovative and widely used products in the world. As an AI Platform Engineer focused on Data Infrastructure youll be at the forefront of building the critical backbonethe Knowledge Graphs and Vector Databasesthat transition machine learning ideas from concept to production in record time.

Your work will directly shape the Roblox experience for millions of users empowering a new era of AI-driven creativity safety and connection. The core focus of this role is to engineer and scale the foundational data infrastructure that grounds and empowers all of Robloxs AI applications.

Why This Role

• Unprecedented Scale: Your contributions will touch billions of users globally driving innovation in gaming learning social connections and creativity.
• Pioneer & Builder: You will play a pivotal role in designing building and scaling our core AI infrastructure from the ground up.
• Cutting-Edge Technology: Work on complex large-scale systems that push the boundaries of modern ML infrastructure including Knowledge Graphs Vector Search and Agentic RAG systems.

You will:

• Design develop and operate Knowledge Graph systems for serving ingesting data and executing graph queries at massive scale for critical ML applications (e.g. recommendations fraud detection safety and social proof).
• Own and significantly improve our Vector Database infrastructure scaling it to support 100B vector searches and ensuring high-performance low-latency lookups.
• Build robust highly available APIs and services to seamlessly integrate Knowledge Graphs and Vector DBs into new agentic and RAG (Retrieval-Augmented Generation) applications.
• Engineer large-scale high-throughput data pipelines capable of ingesting billions of records daily and serving millions of queries per second to power state-of-the-art ML models.
• Research evaluate and pioneer the adoption of the latest advancements in VectorDB technology Knowledge Graphs and Ground Truth Data labeling practices to define new industry standards.

You have:

• 5 years of professional experience designing building and operating large-scale distributed systems and production-grade ML infrastructure.
• Proven expertise in AI platform features with a specific focus on ML Data Infrastructure.
• Deep understanding of the architectural challenges and solutions for highly performant Vector Databases (e.g. indexing partitioning) and Knowledge Graphs (e.g. query languages serving architectures).
• Bachelors degree in Computer Science Engineering Data Science or a related technical field.
• A strong builders mindset driven by a passion for pioneering AI platform innovation and delivering technology that connects people globally.

Required Experience:

Staff IC