About

Liqun Yu is a highly skilled machine learning engineer with over 4 years of relevant experience in the field. He is currently working at Snapchat as a Machine Learning Engineer, where he is responsible for developing and implementing machine learning algorithms for various applications such as search recall and ranking, video/image/text content understanding and moderation, big data pipeline, metrics development, AB testing, and recommender systems. Liqun has also worked as a Data Scientist at Apple, where he focused on Apple Maps search relevance and ranking. He has also worked as an Internship Machine Learning Engineer at Conversant LLC, where he built user-to-vec embeddings with matrix factorization based on terabytes of user browsing data. He also wrote scalable production data pipelines with Spark, Scala, and Hive and applied NLP tools to analyze semantic meanings of the embeddings. Liqun has a Doctor of Philosophy (PhD) in Statistics from Washington University in St. Louis, where he conducted research on distributed numerical optimization for big data, distributed learning strategies in statistics and machine learning, quantile regression, and regularization methods in statistics and machine learning. He also has a Master's degree in Mathematics from the same institution and a Bachelor's degree in Mathematics from the University of Science and Technology of China. Liqun is interested in the latest advances in machine learning and statistics, specifically in NLP, CV, reinforcement learning, and distributed learning strategies. He is also interested in blockchain technology. His tech stack includes ML, Big Data, Reinforcement Learning, Blockchain, Research Scientist, Search, NLP, test, Data Scientist, Computer Vision, Jupyter, Spark, Scala, and Apache Hive. Overall, Liqun Yu is a highly skilled machine learning engineer with a strong academic background and relevant industry experience. He is passionate about the latest advancements in the field and is always eager to learn and apply new techniques to solve complex problems.