Development of web applications

Think of a regular website as a storefront. It's beautiful, everything is visible, but the goods are only delivered through a salesperson.

A web application is an entire automated supermarket with self-checkout, inventory control, and a delivery service. A user (or your employee) logs in and performs actions: generates a report, places an order, views statistics, and communicates with the customer database.

What exactly do I do as part of this service?
1. Designing the architecture and developing the application's "brain" (backend).

2. Creation of personal accounts, CRM and automation tools.

3. Database design and management.

4. Integration and API Creation (How to Make All Programs Talk to Each Other)