Participated in the development and the management of DAVinCI LABS ML core- Implemented target encoding transform.- Integrated existing supervised learning algorithms for time series forecasting.- Added persistence index.- Adjusted hyperparameter search space after conducting experiments.- Added ONNX transform. (POC)- Implemented the model update feature.- Analyzed/optimized memory use.- Suggested support for entity-based datasetsParticipated in developing the Java prediction server/function:- Implemented prediction server starting from existing POC code (Thrift, REST API).- Implemented GRU-D for the Java prediction function.- Refactored CLI by introducing picocli- Implemented key-value storage in SQLIte3 and its schema migration component.- Implemented codes for aggregating system information for debugging customer issues betterParticipated in projects :- Fire safety scoring for buildings (POC) - Seoul Metropolitan Fire and Disaster Headquarters- Coal prices forecasting (time series) - Hucore

Engaged in front-end/back-end/DevOps parts for DAVinCI LABS- Implemented visualization of decision tree (D3.js), the correlation matrix, and the confusion matrix- Implemented UI of under/over-sampling, and cascade models- Implemented I18N- Improved the layout of Dockerfiles and reduced installer size by half- Implemented the scheduled training feature- Developed X-Runner an inference server as a POC (Java, React)- Developed a handler server supporting seamless container restart and on-premise product authorization- Skills: Docker, React.js, CSS, MongoDB, Highcharts, D3.js, Celery, Socket.io, GraphQL, AWS

Engaged in many Java web projects as a back-end and front-end web developer.- Meet the server security requirements of SK Telecom.- Set up Tomcat load balancing.- Resolved SQL query performance issues.- Resolved abrupt Linux file resource limitation issues.- Skills: Tomcat, Spring, Apache web server, IIS, MySQL, SQL Server, Oracle, Apache JMeter, JQuery, JQuery UI, NVD3 (D3.js), Spring security, PBKDF2 Encryption, Thymeleaf, Apache tiles, MyBatisDeveloped and improved file module being used on many projects- Implemented flexible upload module based on javascript jquery plugin- Designed extensible thumbnail component with high-quality Image resizing.- Implemented image and attachment upload based on CKEditor plugin- Developed a common file management component for front-end/back-end.- Provides customizable options.Improved the company's common spring web app framework.- Introduced a full-fledged maven build system

Developed RTSP Client module written on Java. (KT)Developed Mpeg2-TS Closed Caption module written on C and Java. (KT)Participated in PVR module maintenance- Participated in new feature architecture design.- Developed some porting layer test suites.Developed an OpenGL android demo application running on set-top box.Participated in G-Sensor based demo application development.- Engaged in UI parts, G-Sensor emulation remote controller and porting layer development.- Analyzed and resolved memory leak problem which was related to graphic modules.Responsible for TS110 set-top box model maintenance (KT)Participated in ST-7105 board middleware porting.- Implemented some of porting layer requirements.