● Develop HTML summarizing technology - analysis HTML pages and distinguish important part and unimportant part (like menu, header, footer, and advertisement) and extract important part with reasonable thumbnail images - to make Readability or Instapaper style mobile application.● Make optimized non recursive (prefix, postfix, both) tree traverse iteration algorithm to handle hardly nested html tags which issues stack-overflow errors. (especially ruby fiber environment)● Handle large data (large amount of data - more than 10 million tuples, and large size data - HTML contents, hundreds K bytes per contents) from building architecture to service using MongoDB, Memcache and Map/Reduce.● Integrate Facebook open graph and Twitter APIs.

● Open London, UK & Seoul, Korea IDC branch and build remote management environment.● Led engineers to launch 7 games and multilingual web sites (English, Deutsch, and French) integrating web 2.0 services.● Lead engineers to develop on Java/MSSQL Restful XML/Jason auth/billing/update API which is integrated web service and game systems.● Lead engineers to build token base auth API and integrate Social ID (Facebook/Google ID/Yahoo ID/Windows Live/OpenID) using RPX.● Lead engineers to reduce service systems and increase availability using MS Windows Hyper-V virtualization.

Development & maintenance Lycos Mail, Domain Mail, Lycos Weather, Gamesville Search.● Make IMAP server of Lycos Mail services to support iPhone mail client.● Migrate domain mail services from pop3 & squirrel web mail to zimbra mail suites..

Recruit Engineer / Educate Engineer / Cheer up Engineer- HR works for Engineer [ especially to take care of engineer ]Daum-Lycos Development Conference 2007 [ 500+ people, 50+ articles]

Research Core TechnologyDevelopment Standardization & LibrarySupport another service divisionRecruit Engineer & Educate Engineer2nd Daum-Lycos Developer Conference

Search service & Search engineSolution Partner management

In charge of all IT related part of content business division services – video streaming, comic book, avatar, fortune telling, package game, and online board game. ● Led engineer to develop multi-user board game based on Windows Client-server – poker, hoola, go-stop (Korean traditional card game), go, etc.● Led engineer to develop and maintain digital item mall services based on CMS & Digital Assets Management using Java, Servlet, Freemarker, MySQL and Oracle DB.

In charge of all product development of Talkro Series – Talkro CS Agent (Customer Supporting System), Talkro CVMS (Customer Voice Management System), Talkro IR (Information Retrieval), Talkro ARS (Automated Response System), Talkro Watcher (Web monitor).● Named “Talkro” which is combined word “Talk” + “Ro” means “Using”.● Designed, developed, and maintained Talkro Series which is based on Korean natural language process & expert system to recognize Korean text and do preferred action and designed for enterprise level, multi-tier application.

Leader of Technology 2 Team for converging text based backend and new web interface.● Developed Web-Mail – World 1st Web based internet e-mail service. It is core system of Hanmail.net – One of the world largest web-based e-mail services.● Develop Web-Based Bulletin Board System and “IntraWorks”– World 1st Web based bulletin board system and groupware. It is based on C-CGI and CodeBase.