WhatsApp API Messaging Automation SaaS

I'm looking for a developer to create a WhatsApp API SaaS tool focused on messaging automation. The tool should be able to handle: - Messaging automation for: - Text messages - Media (images/videos) - Documents (PDF, Word) - Multilingual support is a plus, but not a requirement at this stage... (Budget: ₹12500 - ₹37500 INR, Jobs: API Development, Cloud Development, HTML, PHP, SaaS Development, Software Architecture, Software Development, Website Design)