Principal Data Engineer, LLM/AI Platforms

This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Principal Data Engineer, LLM/AI Platforms based in United States. This is a principal-level engineering role focused on building the data infrastructure that powers next-generation LLM and AI platforms at massive scale.You will architect and optimize data platforms supporting LLMs, Retrieval-Augmented Generation (RAG), and sophisticated agentic systems.The role combines deep hands-on engineering with technical leadership, platform architecture, and continuous innovation.You will work with extremely large datasets and distributed systems while emphasizing scalability, resilience, performance, and cost efficiency.A major focus is turning advanced AI and data science concepts into reliable, production-grade services.You will collaborate with data scientists, product managers, and engineering teams while mentoring engineers and raising technical standards.This is an opportunity to shape AI platform engineering practices across critical, large-scale systems in a highly autonomous environment.