* Project: New World Online Game (https://www.newworld.com/)* Technologies: C/C++, Networking (UDP/TCP), Multi-threading, NodeJs,TypeScript, Scala, Python, AWS (including but not limited to Step Function, API Gateway, DynamoDB, ElasticCache, S3, Lambda, CloudWatch)Server Engine Side 2019 - 2021 - Worked for developing the server engine using C++ and Lumberyard engine, improving server performance through refactoring the UDP side and improving client connection handling. - Fixed multi-threading and synchronisation issues to ensure robust and efficient server operation.Service Side 2021 - Current - Work on login services, implementing queuing and balancing users to servers from the login service. - Contributed to the development of the match-making system.- Played a key role in supporting the launch of New World in 2021.

* Project: AWS Marketplace Seller Delivery data feeds. - https://docs.aws.amazon.com/marketplace/latest/userguide/data-feed-service.html* Technologies: Java, Python, AWS (including but not limited to Step Function, API Gateway, DynamoDB, S3, Redshift, Batch, Lambda, CloudWatch, REST API) - Handled data management for AWS Marketplace. - Developed solutions using AWS services. - Delivered custom reports for VIP customers. - Launched AWS MP Data Feed.

* Project: Game network engine* Technologies: C/C++, UDP/TCP, Multi-threading - Developed and improved a multi-process game network engine.

* Project: No title, Mobile MMO game.* Technologies: C++, C#, MySQL, NoSQL (Redis), TCP/IP, AWS Cloud, Unity3d - Led the development of real-time distributed server applications for mobile MMO games. - Designed data structures and class frameworks with data-driven systems. - Managed MySQL and NoSQL databases. - Mentored junior developers.

* Project: Mobile Baseball Online game - Hangame Golden Glove* Technologies: C#, Mono, MySQL, TCP/IP, Unity3d - Led server development for a mobile MMO baseball game. - Implemented real-time data processing and network protocols. - Project Highlight: Game awarded 2012 Smart Content Awards (Watch Video: Link)

* Project: Data tool* Technologies: C, C++, MySQL, TCP/IP - Developed data management applications. - Maintained server programs for client data collection.

* Project: MMORPG Chunsangbi2 and Chunsangbi1 Instant Battle Server* Technologies: TCP/IP, Multi-threading, C/C++, Subversion, MySQL, OOP - Developed NPC AI server applications and game play systems for MMOs. - Worked on zone server and instant battle server applications.

* Project: No title, MMORPG* Technologies: C/C++, STL, Boost, Lua, MySQL/ADO.NET, TCP/IP - Developed database agent server applications for MMORPGs.

* Project: MMORPG Chunsangbi2* Technologies: TCP/IP, Multi-threading, C/C++, Subversion, MySQL, OOP, Boost C++ - Developed a framework for a gameplay system over TCP/IP. - Created prototype and alpha version server applications. - Developed a login server application for authenticating client connections. - Developed a zone server application to manage client sessions.

* Project: Chunsangbi1 (http://www.1003b.com/)* Technologies: TCP/IP, Multi-threading, C/C++, Subversion, MySQL, OOP - Maintained and developed gameplay systems over TCP/IP in four countries: South Korea, Taiwan, China, and Japan. - Contributed to the launch of the game in China.

* Project: SKT(SK Telecommunication) Drama Hidden Catch* Technologies: Java, SK-VM - Developed and serviced a mobile game 'SKT(SK Telecommunication) Drama Hidden Catch'.