Jiefeng Chen is a highly accomplished researcher and applied scientist with a robust background in computer science and machine learning. Chen has held positions at prominent organizations, including DeepMind as a Research Scientist Intern, Amazon Web Services and Amazon, focusing on foundation models and Responsible AI. Chen's experience includes software engineering internships at Facebook, where contributions involved developing a Statistics Machine Translation system, and research internships at Google, resulting in published papers in TMLR and EMNLP. Educational qualifications include a PhD in Computer Science with a 4.0 GPA from the University of Wisconsin-Madison and a BS in Computer Science from Shanghai Jiao Tong University. Currently, Chen is employed as a Research Scientist at Google, specializing in large language model research.