I moved to Google in July 2013. I joined ShareThis in June 2012 and was responsible for improving the content analysis product with various NLP and machine learning techniques. I work in Yahoo! Labs as a senior scientist, working in several areas from designing algorithms for the Yahoo! core Web search engine (2008-2009), to building solutions for personalized content recommendation systems(2010-2012). I design machine learning algorithms on Hadoop for extremely large-scale data mining. Specialties Machine Learning, Personalized Recommendation, Search Relevance, large-scale data mining with Hadoop, NLP/Text Mining

Software Engineer @ From July 2013 to Present (2 years 6 months) Research Engineer @ Content analysis and user modeling for Ad Campaign From June 2012 to June 2013 (1 year 1 month) Applied Scientist @ From February 2008 to June 2012 (4 years 5 months) Intern @ Research intern at Yorktown Heights From May 2007 to August 2007 (4 months)

Doctor of Philosophy (PhD), Machine Learning Department, School of Computer Science @ Carnegie Mellon University From 2002 to 2007 Master of Engineering (M.Eng.) @ Tsinghua University From 1996 to 2002 Zhenzhen Kou is skilled in: Machine Learning, Information Retrieval, Hadoop, Data Mining, MapReduce, Natural Language Processing, Text Mining, Information Extraction, Big Data, Python