WORK EXPERIENCE

2023.04 ~ Now, Pebblous.

Project Achievements and Progress Summary

Until July 2024, I focused on developing the Supply Chain Planning (SCP) engine. I built and tested the LP/PP (Long-term Planning/Production Planning) integrated planning engine along with the testing environment. The SCP engine models the SCM (Supply Chain Management) system through surrogate modeling and utilizes AI to determine key policies based on the environment’s conditions. It handles order forecasting, corporate order allocation, order prioritization, and LP/PP policy decisions. The engine simulates the SCM system according to predefined policies and generates the Master Production Plan. The environment conditions are ideally derived from market situations and profit estimation plans but can be simplified to product priorities, due dates, and resource constraints.

Starting from August 2024, I participated in developing the On-Site Quality Evaluation System called Wangjin Kit for Data Clinic’s on-site quality evaluation platform, running on Windows OS. To minimize modifications to the existing Linux-based Data Clinic environment, Windows WSL2 was adopted. This enabled a fast and efficient upgrade from Davom_1.3 to Davom_1.4. The Wangjin Kit includes Auto-login settings, Startup configurations, account privilege settings, and XML-RPC services, making it adaptable for on-premises Data Clinic development. Additionally, I recommended the PyArmer Python code security solution, creating a dual-layer protection environment for Data Clinic source code.

From October 2024, I have been working on the Knowledge-based Exception Agent for Static Modeling and Auto Routing algorithms. This project involves optimal path search and probability-based re-search techniques on graph structures (Nodes and Edges). However, this process demands high computational resources, significant memory usage, and is highly sensitive to initial parameter settings. In high-dimensional problems, the search performance decreases, optimization speed slows, and parameter tuning becomes increasingly complex. To overcome these challenges, I am developing a High-Dimensional Data Navigation System that integrates vector search, clustering analysis, representative cluster detection, and anomaly group detection.

WORK EXPERIENCE

2016.10 ~ 2022.12, OSSTEM IMPLANT CO., LTD. Dental Implant Software Development Team Leader

• Develop the software supporting digital guided implant planning surgery (a.k.a OneGuide SW)
• Design cooperation of PMS (patient management system) and OneGuide SW
• Design mini PACS system for OneGuide SW
• Evaluate and improve automatic registration algorithm with CT and Dental Scan
• Segment tooth regions from CT and generate a dental arch from them
• Place implant objects (implant, abutment, crown, etc.) based on standard dental rules.
• Generate a dental guide template enable 3D printing
• Apply AI external modules to OneGuide SW by rebuilding data structure and modifying application workflow
• Maintain a dental software platform powered by OpenSources; ITK, VTK, qt, dcmtk, jsoncpp, libxml2, openmesh, freetype, carve, glew, polyclipping, poco, libpng, libjpeg, etc

2015.01 ~ 2016.09, Mobience & JJSoftri Freelancer & One Person Company (focus on a Personal Cloud Multimedia Solution)

• Propose one day dental CAD/CAM solution
• Develop Arabic-keyboard for android and iOS
• Study the case; live TV streaming service, Kodi Slingbox
• Port webdav(Web-based Distributed Authoring and Versioning) module into an embedded linux device; Goflex Wireless

2011.06 ~ 2014.04, KTDS Infra Software Engineer

• KTDS Research and Develop New Business Models (WebCall, Enterprise App Store, Cyber Pharmacy)
• Build and manage Datacenter Cloud Storage powered by Nexentastor
• Evaluate and modify a part of customer management system in KT Telecom (a.k.a GENESIS) using Oracle DB and Windows Forms

2007.09 ~ 2010.04, Google Korea Software Engineer

• Compose Onebox search results for human information.
• Analysis logs about web search.
• Detect spam pages by using the proportion of duplications
• Realtime (short term) web crawler for several important web sites.

2006.08 ~ 2007.01, XENOLINK Communications Co., Ltd. Developer designing a multi-channel mpeg4 stream queue which is a main part of DVR software.

• manage a multi-channel mpeg4 input stream
• support network stream clients
• support pre-alarm recording
• manage multiple threads
• use uClinux (A kind of Embedded Linux)

2004.04 ~ 2006.03, SAMSUNG ELECTRONICS CO., Ltd. System Designer for Home AV Network System (a.k.a XHT AV Gateway)

• lead a large-scale co-work project which follows CMMI level II

2002.03 ~ 2004.03, AIRCODE Co., Ltd. System Designer for Webmail System (a.k.a Neomail)

• install APACHE-PHP-mySQL-Sendmail webmail server
• implement a DB agent application balancing load
• implement webmail PHP-pages
• support multibyte language
• build a webmail server on a DOM (Document Object Model)
• build a distributed webmail server using LVS (Linux Virtual Server)

2000.04 ~ 2002.02, CONET Co.,Ltd., XCE Co.,Ltd. Developer for J2ME compatible Java Virtual Machine (a.k.a SKVM, partner with SK Telecom, Samsung Electronics)

• implement SKVM on RTOS (real-time operating system)
• port SKVM on CDMA Phones
• optimize n-Trac (GPS Vehicle Tracking System) MIDLET application
• optimize a CLDC, MIDP compatible platform