Wei Liu
About Wei Liu
Wei Liu is a Senior Director of Engineering with extensive experience in machine learning and data science. He has held various roles at prominent companies such as Microsoft, Amazon, and Sift, and currently serves as a Technical Advisor at Upnext.
Current Role at Sift
Wei Liu serves as the Senior Director of Engineering at Sift since 2024. In this role, he oversees machine learning operations and data science teams, ensuring model stability, data quality, and innovation at an internet scale. He leads the vision and execution of building a next-generation machine learning platform that powers fraud detection and content moderation products for a global customer base.
Previous Experience at Sift
Prior to his current position, Wei Liu held multiple roles at Sift. He was the Engineering Director for Data Science from 2021 to 2022 and the Head of Data Science from 2020 to 2021. Additionally, he worked as a Principal Data Scientist from 2019 to 2020 and as the Engineering Director for ML Platform, MLOps, and Data Science from 2022 to 2024. His contributions included building effective teams and coalitions in the field of machine learning.
Professional Background
Wei Liu has a diverse professional background in machine learning and software development. He worked at Microsoft as a Software Development Engineer II from 2012 to 2016 and at Amazon as a Software Development Engineer from 2011 to 2012. He also served as a Principal Machine Learning Engineer at Zillow from 2016 to 2019. His experience spans various domains, including computer vision, natural language processing, search, and recommendation systems.
Education and Expertise
Wei Liu earned his Ph.D. in Computer Science from the Florida Institute of Technology, where he also worked as a Doctoral Student and Teaching Assistant from 2007 to 2011. He completed his Master's degree in Computer Science at Central South University from 2003 to 2006. His academic background supports his expertise in machine learning and data science.
Advisory Role at Upnext
Since 2021, Wei Liu has been serving as a Technical Advisor in Machine Learning at Upnext. In this capacity, he provides guidance on machine learning strategies and helps build effective teams and coalitions within the organization. His role emphasizes empathy and empowerment for stakeholders and contributors in interdisciplinary projects.