Experience

Visang Education

• South Korea
• Education Administration Programs
• 1 - 100 Employee

• Head of Edu. Tech Development Center

  • Dec 2022 - Present

  - leading 4 teams who are developing web-based content solutions and content editors, making the education platform with the video conference and operating and developing an e-Learning Management System.- is parting in making a content editor which creates for student Math or English contents

• Senior Software Engineer Team Lead

  • Apr 2020 - Nov 2022

  - leading to develop web-based content solutions and editor and making the education platform with the video conference.- developing PC / Mobile applications by using Electron, react, typescript, redux, mobx, GO, Kotlin/Java, Swift, and gRPC



KDMT co.

• Senior Software Development Engineer

  • Aug 2019 - Feb 2020

  - Implemented web-based Education Content solutions by using React.js, TypeScript, and Mobx - Implemented web-based Education Content solutions by using React.js, TypeScript, and Mobx



Trustfarm Mobile Inc.

• Senior Software Engineer

  • Jan 2019 - Jul 2019

  - Implemented the Video Platform site (http://www.xrtube.net) by using PHP. The related GitHub URL is https://github.com/xrtube/xrtube-client - Implemented the Blockchain site (http://api.trustcoinmining.com/) by using PHP. - Implemented the Education Content solution by using React.js with KDMT which I worked for 5 years. - Implemented the Video Platform site (http://www.xrtube.net) by using PHP. The related GitHub URL is https://github.com/xrtube/xrtube-client - Implemented the Blockchain site (http://api.trustcoinmining.com/) by using PHP. - Implemented the Education Content solution by using React.js with KDMT which I worked for 5 years.



ABC Dev Inc.

• Web & Mobile Developer

  • Apr 2018 - Nov 2018

  Implemented websites with Nancy framework (C#/.NET/Restful), Javascript framework (Keno UI) and SQL Server. The website push messages to Android phones by using Google Firebase API and provides location monitoring service to display moving locations by using Google map API. Customized a website with Lumen micro-framework (PHP/Restful), JavaScript/JQuery, Kendo UI and MySQL. Updated functions of an Android app used by a transportation company with JAVA/Dagger 2/OkHttp 3/ORMLite/Google Firebase API. Show less



Somoplay Inc.

• Canada
• Software Development
• 1 - 100 Employee

• Android Developer

  • Jan 2018 - Apr 2018

  Took part in making Android apps as a volunteer android developer. The one app is for online date service and the other is for making game maps. Used skills like RxAndroid/RxJava. Took part in making Android apps as a volunteer android developer. The one app is for online date service and the other is for making game maps. Used skills like RxAndroid/RxJava.



Beacontree Technologies Inc.

• Computer Software
• 1 - 100 Employee

• Software Developer (co-op)

  • Sep 2017 - Dec 2017

  Created/Updated JAVA PC application communicated with Android Phone via USB cable Built New Functionalities of Android App (name: One-Touch Inspection) Assist Web Program's development Created/Updated JAVA PC application communicated with Android Phone via USB cable Built New Functionalities of Android App (name: One-Touch Inspection) Assist Web Program's development



KDMT Co.

• Senior Mobile/Web Developer / Team Lead

  • Sep 2009 - Dec 2015

  In KDMT, I developed and updated several e-Learning/e-Book mobile apps, web applications and websites with Content Management Systems (CMS) & edit tools using Adobe Flash/AIR, ActionScript, and ASP/ASP.NET(C#) or JSP/JAVA/SPRING 1) E-Learning Solutions (‘Activity’) includes - Contents creation, editing, and template features - Communicate with customer Learning Management System (LMS) - Provide video/audio (streaming) play, voice recognition (3rd party), animation effect, etc. - View online contents and downloaded contents 2) E-Book Solution(‘DMOOK’) includes - Convert PDF, MS-Word, MS-Excel, MS-PowerPoint and Image to e-Book - Embed multimedia files (video/audio/image/flash file, etc.) - Provide e-Book accessories (Note/Text & Image Clipping/Search, etc.) - Used for universities, libraries, local governments, churches, publication companies, etc. < Sample sites > ▪ Web pages (http://www.dmook.com, http://arch.seoularts.ac.kr/, http://www.ybmfarm.com) ▪ Android App (https://play.google.com/store/apps/details?id=air.com.visang.englisheye&hl=ko) ▪ iOS (https://itunes.apple.com/us/app/activitymanager/id979801732?mt=8) ▪ Web Application (http://www.ybmfarm.com/common/activity.do?books_id=J-GK-ell-19&coursetype=free&free_type=word) Show less



Portal-Tone Co. / SDCast Co. / Innophil I&C Inc

• Senior Software Developer / Team Lead

  • Feb 2006 - Jun 2009

  As a Senior Developer, I lead the developments of server-side modules and websites for performing online businesses. I did: 1) Multi-threading & Network Programming using VC++/IOCP/Socket - Online betting game - Credit Card VAN(Value Added Network)’s mileage/point management service - Advertisement seller’s payment solution 2) Web programming using - ASP/ASP.NET(C#.NET)/MS-SQL in Windows Server - PHP/MySQL in Linux Server As a Senior Developer, I lead the developments of server-side modules and websites for performing online businesses. I did: 1) Multi-threading & Network Programming using VC++/IOCP/Socket - Online betting game - Credit Card VAN(Value Added Network)’s mileage/point management service - Advertisement seller’s payment solution 2) Web programming using - ASP/ASP.NET(C#.NET)/MS-SQL in Windows Server - PHP/MySQL in Linux Server



WiderThan co. (renamed to RealNetworks A.P.)

• Local Technical Lead / Aboard Project Manager / Technical Support Engineer

  • Oct 2002 - Jan 2006

  1) As Local technical manager at WiderThan branch in the Philippines, I was in charge of - Troubleshooting system with local engineers - Coordinating between local engineers and headquarters (Korea) support engineers - Upgrading CMS with local developers and content payment service with headquarters developer (Java/JSP/XML) 2) As an Aboard Project Manager, I managed - Ring Back Tone system installation and integration with local system in the mobile carrier companies of the Philippines, Vietnam, and Thailand - Local Ring Back Tone CMS development 3) As a System Support Engineer, I performed - 2,3 Level troubleshooting support (1 Level local engineer only) - Ring Back Tone system installation in Indonesia and USA - ‘Metee’(Messenger program) service installation and testing in Israel Show less



HanaroDream co. (was a HanaTelecom’s affiliated company)

• Junior Web Developer

  • Mar 2000 - Sep 2002

  I developed/created several portal web services. The area of development included: - Online deposit and payment component (VB/VC++ DLL, MS-SQL stored procedure) - Member management service (ASP, LDAP) - Gathering content usage history & weblog and built statistics system (ASP, MS-SQL, VC++) I developed/created several portal web services. The area of development included: - Online deposit and payment component (VB/VC++ DLL, MS-SQL stored procedure) - Member management service (ASP, LDAP) - Gathering content usage history & weblog and built statistics system (ASP, MS-SQL, VC++)



LG Soft co. (merged to LG CNS Co.)

• Web Developer

  • Mar 1998 - Feb 2000

  I developed workflow management systems using CGI, Unix C, Oracle, and Pro*C: - LG GroupWare 2.0 workflow for LG-affiliated companies - Software product for public enterprises or public sectors I developed workflow management systems using CGI, Unix C, Oracle, and Pro*C: - LG GroupWare 2.0 workflow for LG-affiliated companies - Software product for public enterprises or public sectors