Node.js is an open-source, cross-platform, JavaScript runtime environment that executes JavaScript code outside a web browser.

Vue.js is an open-source model–view–viewmodel JavaScript framework for building user interfaces and single-page applications.

Google Tag Manager is a tag management system (TMS) that allows you to quickly and easily update measurement codes and related code fragments collectively known as tags on your website or mobile app.

Kakao platform provides various services such as Kakao Talk, Kakao Talk Channel, Kakao Story as well as Kakao Pay, Kakao Commerce, Kakao Page provided by the subsidiaries. Users can use all Kakao platform services with a united account called Kakao Account.

Nuxt is a Vue framework for developing modern web applications.

Nginx is a web server that can also be used as a reverse proxy, load balancer, mail proxy and HTTP cache.

OpenResty is a web platform based on nginx which can run Lua scripts using its LuaJIT engine.

Cloudflare is a web-infrastructure and website-security company, providing content-delivery-network services, DDoS mitigation, Internet security, and distributed domain-name-server services.

Express is a web application framework for Node.js, released as free and open-source software under the MIT License. It is designed for building web applications and APIs.