• I am a software engineer interested in both front-end development and back-end development. • I am very passionate in learning new technologies as well as improving skills in current technologies. • I am interested not only in big data processing, data mining, and analysis using map reduce, but also in interactive pages developed with current web technologies. Skills: • Programming Languages: JAVA, C#, PHP, SQL, C, C++ • Web Technologies: HTML5, CSS, JavaScript, YUI3 • Grid Technologies: Hadoop, Native Java Map-Reduce, Oozie • Scripting: Unix Shell (Bash), Perl (Beginner), Ruby (Beginner)

Software Engineer @ Platform Engineer - Ad serving online server management, feature implementation including Campaign Budget Management Feature, Campaign Optimizations Support, User Optout System Integration, Supply Partner Integrations, Video Ad Support, etc. - Designed and Implemented Cross Device Ad Serving Platform - Integrated Kafka framework for online server log-processing - Migrated online servers from Amazon AWS to our own colo - User Data Analysis using Hadoop Map/Reduce. - Support Ad-Operations Team to resolve any issues related to ad campaign operations From June 2012 to Present (3 years 7 months) Technical Yahoo, Software Development Engineer, Intermediate @ • Member of User Understanding Services team under Knowledge and Personalization Group that focused on gathering information about users and understanding them in order to deliver personalized experiences • Created a new webpage to automate on-boarding process of new customers who want to utilize the data on grid • Contributed to ingestion and modeling components for transferring Yahoo address book data onto grid using Hadoop • Working on ingestion and modeling Facebook page data that are liked by Yahoo-Facebook connected users onto grid in order to help extract the users’ interests for personalization • Working on generating list of users who chose to opt-out from Yahoo Social Chrome experience on grid From September 2011 to June 2012 (10 months) Research Assistant @ Research Assistant in Illinois Security Lab. Participated Projects: 1. Building Automation Middleware (Aug 2010 - May 2011) • Provided a web access to building control network without compromising security in multi-tier system 2. Unified Headend Interface for Smart Grid Applications (Mar 2010 - Nov 2010) • Designed Unified Headend Interface Architecture Model • Implemented a prototype using Windows Communication Foundation and C# From June 2009 to May 2011 (2 years) Teaching Assistant for CS105 - Introduction to Computing with Application to Business and Commerce @ • Taught two hours and assisted one hour of lab sessions per week (40 students) • Created programming assignments and exam questions From August 2008 to May 2009 (10 months)

MS, Computer Science @ University of Illinois at Urbana-Champaign From 2008 to 2011 Bachelor of Science (BS), Computer Science and Engineering @ 서울대학교 / Seoul National University From 2001 to 2007 HeeDong Jung is skilled in: Java, Hadoop, MapReduce, C#, PHP, Linux, HTML, CSS, JavaScript, YUI, Computer Science, C++, Perl, Unix Shell Scripting, Software Engineering, C, Bash, Shell Scripting