I'm looking for a custom QR code solution for our retail medical shop. The QR code should trigger a default action that collects the following information: - Name - Number - Bill Number - Bill Amount Additionally, we need to send a percentage of the bill as cashback. A WhatsApp welcome message should also be triggered upon scanning the QR code. Requirements: - Ability to create a QR code that collects specified information - Integration with WhatsApp for sending welcome messages - Mechanism to deliver cashback information and request for next purchase via WhatsApp or normal message Ideal skills and experience: - Experience with QR code generation and integration - Familiarity with WhatsApp automation - Strong communication skills for message crafting