ToolJet/docs/versioned_docs/version-2.2.0/contributing-guide/setup/architecture.md

id	title
architecture	Architecture

Introduction

ToolJet has two main components: ToolJet Server and ToolJet Client.

1. ToolJet Server

ToolJet server is a Node.js API application. Server is responsible for authentication, authorization, persisting application definitions, running queries, storing data source credentials securely and more.

Dependencies:

• PostgreSQL - ToolJet server persists data to a postgres database.
• Email service (SMTP/Sendgrid/Mailgun/etc) - Required to send user invitations and password reset emails.
• PostgREST (Optional) - Standalone web server that converts PostgreSQL database into queryable RESTful APIs for Tooljet Database.

2. ToolJet Client

ToolJet client is a ReactJS application. Client is responsible for visually editing the applications, building & editing queries, rendering applications, executing events and their trigger, etc.

Requirements

1. Node version 14.x