Customer wise Automatic Invoice PDF file to be send on Whatsapp to each customer

I am looking for a freelancer who can help me automate the process of sending invoice PDF files to my customers on Whatsapp. The project involves the following requirements:

Invoice Format:
- The freelancer can use either a standard format or a custom format for the invoices. If I have a specific format in mind, I will provide it to the freelancer.

Database:
- I have a database of customer information that the freelancer can use. This database will contain all the necessary details required for generating the invoices.

Automation Method:
- There is no specific preference for the method of automation. The freelancer can either use a software tool or write a custom script, depending on their expertise and recommendation.

Ideal Skills and Experience:
- Experience in automating invoice generation and sending via Whatsapp.
- Proficiency in using software tools or writing custom scripts for automation.
- Familiarity with handling databases and integrating them with the automation process.

If you have the necessary skills and experience, please reach out to discuss the project further.