The New Standard of Email, Evolved by AI

Manage and lead all engineering (Mobile, FE, BE, Data, ML/LLM, MLOps, DevOps, and DA) of Riiid- Setup AI vision for product. Diagnostics with Multi Choice Questions by ML (Content-based Knowledge Tracing + Score Prediction + Recommender System), Diagnostics with Short Anwser Questions by mixed LLM and ML. Quiz Generation Engine by mixed LLM and ML. AI Tutor to help whole learning experice by mixed LLM and ML.

Build Moloco ML/Ad SaaS Platform and manage technical integration and operation for enterprise customers· Worked with various internal teams and external enterprise customers in every stage of building, integrating, and operating for Moloco Retail Media Platform and Performance Ad Server solutions

Lead a global organization of 150 people to build and operate Samsung Mobile Ads platform- Built teams at Korea, California, and India for development and business, and set up collaboration- Awarded as one of best culture organization every year (Performing, happy, and growing)- Developed and operated Samsung Mobile Ads platform (SSP, DSP, DMP) for over 20 countries- Built many mobile ad inventories in Samsung apps like Game Launcher on Galaxy phones- Built DSP for gaming market by ML targeting with mobile data (CPI/ROAS optimized)- Built Ads Data Warehouse for hundreds of million for Galaxy users for better ML- Helped to rebuild strategy and organization for Samsung Game Partnership for several months* Platform, AWS, GCP, Machine Learning, Data, Growth, Mobile, Programmatic, Game, Commerce. Digital Transformation, Agile Transformation, Good Development Culture

Lead a global organization of 200 people to make global Nexon PC and Mobile gaming platform - Built very energetic and good performing US platform team at Irvine, CA- Released Nexon Global PC Platform on AWS to US, EU, and TH. Also expanded to TW- Helped Mobile Platform team to make Nexon Global Mobile Platform on AWS - Helped to coordination of all global tech divisions of Infra, Security, Analytics, and Platform - Rebuilt whole org by new processes like performance review, hiring, backlog, and many more* Platform, AWS, PC, Mobile, Data, Global, Digital Transformation, Agile Transformation, Cloud Transition, Good Development Culture

Lead several teams to make and manage platform, tools, and library, also design and implement new technology. Experience of supporting 50+ millions users, and many internal studios with internal SDKs and services- Lead a team to develop and manage delivery pipeline and development pipeline for HearthstoneDesigned and implemented optimized delivery model for Google Play and CN Android marketWorked with Unity company to update Unity Editor to make better Hearthstone development modelDeveloped testing framework and tools to manipulate account and purchasing license for Hearthstone- Designed and developed Next Gen Data Pipeline for future Blizzard games with all automated system. Prepared automated testing and automated deployment to make no manual work- Lead a team to develop BlizzardCore shared library & Streaming technology for all Blizzard games. Updated, debugged, and tested all Blizzard games for shared library for PC, Mac, and Linux- Lead a remote team at Korea to develop social platform extension to connect Facebook to Battle.net. Developed Voice Chat service to enhance Battle.net for future- Lead a team to develop Battle.net Desktop App and Battle.net Update Agent as a new unified platform. Designed for automated testing from the beginning and made automated testing system working- Made standard Blizzard Report system for public tool crash report, error report and public usage report. Used many reports by Blizzard Report system to improve product quality worldwide- Lead a team to design and work for many automation systemWoW automated testing systems, Automated patch testing system and Automated install testing system- Lead a team to add new contents for Blizzard legacy games like SC, D2, WC3

Multi-function information browser solution for Palm OS/Pocket PC for worldwide market- Directed whole development of HandStory, an all-in-one information browser solution for mobile

B2C and B2B easy voice-mail solution development for Windows client & Linux server. Multi million users

Korean word processor HWP core development and administration for team