I need a developer who can set up the official WhatsApp Business API for a pure marketing and promotions workflow. My campaigns will rely heavily on rich media—images and short videos—so the solution must handle high-quality file delivery without compression issues and keep me compliant with WhatsApp template guidelines. My contact data will arrive as CSV files that I upload, so I’m looking for a straightforward import mechanism (no CRM sync required right now) plus a simple way to segment or tag those numbers before each blast. Here’s what I expect at hand-over: • Fully activated WhatsApp Business API instance tied to my verified number • A lightweight web or desktop interface—or clear Postman collection—that lets me 1) upload a list, 2) create or select an approved template, 3) attach images/videos, and 4) send or schedule the campaign • Documentation that walks me through token refresh, media hosting rules, daily rate limits, and how to add new templates myself • A quick test run with a small list so I can see delivery receipts and message analytics in action Experience with Meta Cloud API, node.js or Python wrappers, and basic UI work is ideal, but I’m open to the stack you prefer as long as it ships a clean, secure solution I can use immediately.