Jiachen Li is a software engineer with experience at major tech companies. At TikTok from February 2023 to February 2025, Jiachen focused on data architecture and developed the end-to-end real-time recommendation system for the main feed. Following this role, Jiachen joined Amazon in March 2025, working on a special project related to machine learning infrastructure, specifically in large language model training and inference. Prior experience includes an internship at Twitter in 2021, contributing to the Notification Relevance Infrastructure team. Jiachen holds a Bachelor of Engineering in Electrical, Electronic and Communications Engineering Technology from Wuhan University of Technology and a Master of Science in Computer Science from the University of Southern California.
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