- GAJAGO (Travel, Leisure E-Commerce Service : http://www.thegajago.com)Spring Boot + JPA / Hibernate environment was developed and I was usually interested in ORM I have a good understanding of JPA, I use it efficiently and increased productivity.Designed and implemented various types of commodity domains. I also linked tickets and accommodation products with API. In order to increase the number of API affiliate companies and to improve the advanced condition search performance, Cache Layer was designed using Redis.Continually refactoring through TDD to maintain quality, quickly and clearly testing additional functionality and deploying without spoiling every two weeks.Through these experiences, I once again realized the importance of TDD, OOP, and Software Architecture.Role As • Domain Modeling• Developed API Service• Developed Batch Service• Developed Ticket, Hotel API Interface• Developed Payment Gateway Interface• Designed Relational Databases MySql• Designed Cache Layer Redis

Developed API Server and Batch Server in various domain environment with C # / ASP.NET environment. I have never studied C # separately, but I understood C ++ and OOP so it was not difficult to adapt.Understand the advantages of WEB environment different from existing TCP / IP and have gained experience of handling many traffic in corporate solution.Role As• Developed API Server by DSME Co., Ltd. Cooperation Companies Entrance Management Solution• Developed API Server by DSSW Co., Ltd. Vehicle Entrance Control Solution• Developed API Server by DSME Co., Ltd. Office Entrance and Fire Detection Solution• Developed Batch Server by DSME Co., Ltd. Solution• Designed Relational Databases MS-Sql, MySql, Oracle, SQLite

Developed Middleware Server using C ++. I had a basic understanding of OOP and TCP / IP, and I made further progress while I was working on the project.Generally developed to communicate with embedded devices and transfer them to Web Server or directly to DB.Experience of effectively handling data in small memory devices and once again reminds us of the importance of object orientation to create scalable programs.Role As• Developed Middleware Server for USN Home Safety Solution• Developed Middleware Server for USN Industrial Safety Solution• Designed Relational Databases MS-SQL