● Designed and developed Global Infrastructure Dashboard  * Provides server statistics about the whole infrastructure.● Designed, developed, and maintained IT Operating Cost Calculating System(H/W, S/W, Network, IDC, Public Cloud, Private Cloud, CDN, Security, Support)  * Provides settings UI and statistics UI.  * Integrated with EDRMS system.  * All operating costs are calculated by the respective cost allocation method and distributed to each project.  * Provides billing features to issue a bill to affiliates.● Maintaining and Improving IT Resource Management System—an internal service by in-house development—.  * Troubleshooting related issues.  * Performed maintenance tasks—implementing HTTPS(web server, web socket), upgrading NodeJS(0.10.32 → 16.14.2), upgrading Lodash(3.10.1 → 4.17.10), upgrading Bootstrap(2.3.1 → 4.1.3), upgrading AngularJS(1.2.0 → 1.7.5), implementing CI/CD using Gitlab CI.  * Revamped Public Cloud Management Service(AWS only) to support other new cloud service providers. (Azure, GCP, TencentCloud)  * Improved monitoring and alarm feature to enhance Cost Management and Security Compliance in Public Cloud. (AWS, Azure, GCP, TencentCloud)  * Improved Public Cloud Management Service to provide cost and resource statistics.  * Replaced an old-fashioned template with "Angle - Bootstrap Admin Template".  * Applied website localization for overseas corporations.  * Designed, and developed a monitoring dashboard for a multi CDN(Akamai, Cloudfront, AzureCDN, etc).  * Designed, and developed a budgeting feature with an approval process for Public Cloud.(AWS, Azure, GCP, TencentCloud)  * Designed, developed a cost explorer feature for public cloud(AWS, Azure, GCP, TencentCloud) using cube.js  * Designed, developed a personalizable analytics dashboard feature for any statistic data using cube.js  * Designed, integrated, automated to deliver Apache Superset BI Reports via email  * Applied Gen AI Summarization to Cloud Budget Review

● Assigned to maintain and improve Customer Portal.  * Troubleshoot customer issues.  * Developed REST APIs.  * Designed and developed Service Status Dashboard.  * Implemented the report UI of new products.(Web Performance Optimization, Cloud Image Converter, DDoS Mitigation)  * Migrated the application from a legacy portal.(Online Help Desk)  * Migrated the report UI of some products from a legacy portal.(Aqua Auth, Aqua Director, Aqua DRM)  * Renewed and improved the module that it sends reports to customers regularly through an email.● Assigned to maintain and improve Operator Portal.  * Troubleshoot operator issues.  * Implemented the configuration UI of new products.(Web Performance Optimization, Cloud Image Converter)● Maintained Content Uploader service for integrating Samsung FOTA(Firmware Over The Air) and CDN solution.(exclusive for Samsung)● Advanced Content Uploader service for commodification.(made the contract with LG electronics)● Advanced the task sending emails to customers by using Windows Task Scheduler.(changed to Python Celery)● Contributed in developing an automation process to build a test environment.

● Built a social trading website like eToro, ZuluTrade which provides online community and profit ranking service for traders and investors.● Designed, developed and deployed the following functions/features for the said website:  * Ranking - Showing top traders and top investors  * Blog - Showing trader’s strategy and performance about his trading.  * Messaging - Messaging service for the users of the website.  * Profit simulator - Allows investors to predict their profits by following the trading of the traders they choose.  * Data analysis - Extract tendencies and characteristics from traders’ transactions.  * General features of the website - Log in, Logout, Sign up, Profile, About, Q&A, Bulletin boards.