Cysharp is a company specializing in the C# programming language, established in 2018 with the aim of "exploring the possibilities of C#." They work with Cygames to build both client-side technologies represented by Unity and server-side C# technologies with a focus on performance, contributing to the development of technology and the community in the game industry. They are looking for someone to support the implementation of C# server-side applications, requiring knowledge and development experience in backend. They are involved in implementing game servers using MagicOnion, developing SaaS (unpublished) to support Unity and .NET development, and developing C# related OSS. Depending on the skills and desires, involvement in these areas is also possible.