Brooke (Xiaoxi) Bian is an accomplished artificial intelligence and machine learning infrastructure expert, currently serving as a Staff Software Engineer and Technical Lead for a 20-person team at Meta. She specializes in designing and deploying ultra-large-scale, low-latency personalized ad and product ranking systems powered by ML, GPUs, and LLMs. Brooke has spearheaded the development of highly efficient recommendation frameworks that operate at a 100-billion product scale while maintaining strict latency, reliability, and privacy constraints. Ultimately, these systems evaluate and optimize millions of models daily to serve over 10 million businesses and advertisers.