Cold Beverages Vending Machine Design

I'm seeking a skilled professional to design a vending machine specifically for dispensing cold beverages. This machine should be able to accept UPI payments exclusively.

Key Requirements:
- Design and development of a vending machine for cold beverages
- Integration of UPI payment technology
- Ensuring the machine is user-friendly and efficient

Ideal Skills:
- Experience in vending machine design
- Proficiency in payment technology integration
- Understanding of user-friendly design principles

Please include relevant examples of your previous work in your proposal.