Need back development in PHP Laravel

Development and configuration of RESTful API for interacting with the frontend part.Implementation of business logic for processing applications, uploading documents and verifying data.Integration with external systems via API (for example, the Tunduk portal, the register of legal entities, the DGC system for payment processing).Development of a mechanism for automatic verification of documents, verification of applications and generation of permits.Implementation of a payment system through integration with the bank for automatic linking of payments and processing of fees. Development and implementation of a digital signature mechanism for permissions.Setting up and optimizing the database for storing applications, documents and the history of their changes.Ensuring data security, including encryption of sensitive information and protection against unauthorized access.Testing and correcting errors, as well as ensuring the scalability of the system.

I will send the technical specifications personally