Managed an acquisition/retention metric, and maintained the technical quality of the service.

Developed a deep-learning based contents recommender system with Tensorflow and Kubeflow. And managed an on-premise and public cloud based infrastructures.

Developed a subscription calendar platform 'Linder' based on iCalendar(RFC 5545) for an increase in trust between companies and customers. Furthermore, our goal is rediscovery of the value of an electronic schedule management. A schedule represents confidence with others and it's also people's their own life itself. Since many useful information have been digitized, we expect an electronic schedule management to be inevitable and valuable.

Developed the new feature and maintained/operated for an influencer commerce 'Marketit'. Managed the MySQL database for customer support. And developed the batch scripts (crawler) for the service using Python. Also, maintained CRM web application for the service using PHP, AngularJS.

* Magic Mirror — Developed a SVOD service platform solution based on SDN/NFV technology for media contents providers like OTT(Over-the-top) players. Extended OpenStack Tacker and OpenDaylight. * Hybrid Cloud Implementation with OpenStack Developed a hybrid cloud solution extended OpenStack. Extended the OpenStack services(Heat, Ceilometer, and Horizon). The hybrid cloud solution was for the cloud bursting. The virtualized resources are auto-scaled from private cloud side which is deployed OpenStack to public cloud side which is based on Amazon Web Services.* Design and Implementation of the new Filesystem for Linux Developed a new Filesystem "Maestro Filesystem" based on FAT for Linux. Developed the Linux kernel module for R/W a file with the new Filesystem.

In Smart Media Research Center, developed the service that makes the video advertisement for small business. Developed a web service 'SignCast' for displaying the video advertisement on a digital signage using Chromecast. And, developed the backend server applications for deployment on various media services.

Developed a new service product '번개택배'​. This service was provided by Android application and web both. Developed the Android application client and Python web application(back-end & front-end both), and designed for this service with Google Holo UI & Material Design. Also, maintained developing the back office system for '번개장터(Quicket)' with Python, MySQL, Javascript.

Developed an Android application service '데일리호텔(DAILYHOTEL)' working with the web API server. Optimized the application client for performance and an efficient maintenance. Implemented the customized View for Android, and design an architecture of connection between client side and server side.