Senior Software Engineer @ Scalability engineering From May 2015 to Present (8 months) Sr. Software Engineer @ cloud based high available/scalable web services - p2p gateways - experiment and configuration services From January 2012 to April 2015 (3 years 4 months) Sr. Software Engineer @ Cloud based web services - chat services From December 2010 to January 2012 (1 year 2 months) Sr. Software Engineer @ * distributed data store/parallel data processing platform dev * large scale data processing algorithm dev * data mining algorithm dev * keep the data pipeline running in colo production (less intellectual stimulating but most challenging :-) ) * large scale web crawling (nutch + hbase + hadoop map/reduce) * large scale distributed non-sql database (hbase) * async rpc framework (mina + protobuf) * workflow management system From September 2007 to December 2010 (3 years 4 months) Technical Yahoo! @ My team does behavior targeting for online advertisement. There are 5 billion cookies being processed everyday. From September 2006 to September 2007 (1 year 1 month) Sr Member of Technical Staff @ I was "accquired" by oracle :-) (thru the siebel-oracle merger) Can't beat us? buy us :0 From March 2006 to September 2006 (7 months) Sr. Software Engineer @ I worked in core technology / server / OM (object manager) group. The very core of siebel applications. From July 2001 to March 2006 (4 years 9 months)

MS, Computer Science @ University of Wisconsin - Madison From 1999 to 2001 BS, Automation @ Tsinghua University From 1994 to 1999 Haijun Cao is skilled in: Scalability, Distributed Systems, Hadoop, HBase, Algorithms