Comprehensive SMS Management Web Platform

Of course. Here is the project description in English.

Project Description: SMS Management Platform via HTTP API
The goal of this project is to build a comprehensive web platform for managing and sending SMS messages via an HTTP API. The platform will allow users to send individual or bulk messages, track delivery status, manage contact lists, and monitor their account balance.

Core Features:

SMS Gateway API: Provide a powerful and user-friendly API that allows developers to integrate SMS sending capabilities into their applications and websites.

Contact Management: The ability to add, edit, and delete contacts, as well as organize them into groups for easy bulk messaging.

User Dashboard: An intuitive user interface (UI) that enables users to manage their accounts, send messages, and track their message history.

Reports and Analytics: Offer detailed reports on message status (delivered, failed, pending) and usage statistics.

Billing and Invoicing System: Manage user credits, track the cost of each message, and provide a system for topping up the account balance.

Required Freelancer Tasks (Backend Developer)
We are looking for a specialized backend developer with strong experience in building complex systems and managing databases. The main responsibilities will be to build the platform's backend infrastructure and develop the user and billing systems.

Technical Requirements:

Strong Backend Experience: Proficiency in backend languages such as Python (Django/Flask), Node.js (Express), or PHP (Laravel).

Database Management: Expertise in working with relational databases like MySQL or PostgreSQL, or non-relational databases like MongoDB.

API Development: Experience in building and securing RESTful or GraphQL APIs.

Payment Systems: Experience integrating electronic payment gateways (e.g., Stripe, PayPal, or other local payment gateways) to manage invoices and credit top-ups.

Specific Tasks:

Build the Backend Architecture: Establish the project's core structure, including server setup, database configuration, and data schema design.

Develop the User System: Build the login, registration, and user management system, including access permissions (e.g., standard user, admin).

Design and Develop the Billing System:

Create a table to track each user's credit balance.

Program a mechanism to deduct the cost of each SMS message sent.

Integrate a secure payment system to allow users to purchase additional credit.

Create APIs for tracking invoices and transaction history.

Build the Core API: Program the API interface that will receive message sending requests and communicate with the external SMS provider (e.g., Twilio, Vonage, or others).

Secure the System: Implement security best practices to protect user data and secure the API from attacks.