Developer Needed for UPI Payment Integration (Vending Machine Project) Description: I’m setting up vending machines imported from China that need to accept UPI payments in India. The vending machines will connect to a backend system that handles payments and confirms successful transactions before dispensing products. I’m looking for a developer experienced with UPI or payment gateway integrations (such as Razorpay, Cashfree, or Paytm). You will be responsible for: Setting up and configuring a suitable payment API Creating the backend system or bridge between the vending machine and payment gateway Ensuring reliable confirmation of payments and communication with the machine software We can discuss the best way to implement this, including which payment provider to use and how the flow should be structured. Requirements: Prior experience with UPI / payment gateway integrations Ability to build and host a backend (language and stack flexible) Clear communication and documentation Deliverable: A working solution where a vending machine in India can accept UPI payments and confirm successful transactions automatically.