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Bulk SMS Sending


The client needed a web application that would allow for bulk SMS messaging. The goal was to create a system where users could easily select individuals or groups to whom they wanted to send SMS messages, write the message, and send it.

Web application for bulk SMS messaging with group selection

We developed a web application that enables users to log in using Windows Single Sign-On (SSO) and then send SMS messages through a simple interface. Users can select recipients either individually or as an entire group. After entering the message text, the SMS is sent via a connected hardware SMS gateway located within the local network. This gateway contains a SIM card and allows message delivery through a defined API, which we integrated into the application. Thanks to SSO, users log in automatically with their account without having to enter a password.

System architecture with connected SMS gateway and SSO login

The web interface was designed to be clear and user-friendly. After sending the message, the system displays a confirmation of successful delivery, and users have the option to browse the history of sent SMS. The entire solution is fully web-based and runs on the Nette framework with an SQL database for storing contacts and records of sent messages.

Used technologies

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