Web-Based Billing System with Integrated Stock Analysis and Predictive Sales Forecasting

A web-based billing system with integrated stock analysis and predictive sales forecasting.

A web-based billing system with integrated stock analysis and predictive sales forecasting. It is offered as a reference project: a complete, worked example of how a system like this is designed, built and evaluated, so that a developer can study it, run it and learn from it.

It suits learners building full-stack skills: user accounts and roles, a database-backed back end, a responsive front end and deployment.

The main parts are secure sign-up with role-based access, a database-backed back end with a clear API, a responsive interface for each type of user, and an admin view to manage records. The reference build uses scikit-learn, React, Node.js, Express, and PostgreSQL, with a clear project structure, setup instructions and sample data so that it can be run and extended.