Responsibilities include the construction and operation of infrastructure for our online services. This involves the efficient and stable operation of our services, which experience rapidly increasing user traffic due to our diverse range of content, including smartphone apps, social games, and browser games. The main tasks involve the construction, operation, and maintenance of Linux servers. In addition, there are increasing opportunities to participate in upstream processes such as negotiation and requirement definition, due to the growing coordination with MSPs, cloud providers, and other projects. As a rapidly growing service, there are opportunities to actively take on new challenges without being limited by the boundaries of the work.