Razorpay POS Bridge Integration in Flutter: Trigger Payments Without App on POS Device

When I first got assigned to integrate a POS system with Razorpay during my internship, I didn’t quite realize what I was stepping into. With limited experience in POS payment systems, I jumped in without fully grasping the range of options and complexity involved. Razorpay’s documentation starts by covering POS Bridge — a feature that allows card, UPI, and other digital payments even when the app isn’t installed directly on the POS device. Since it was the first option in the documentation, I decided to go with it, unaware at the time that there were actually multiple integration methods.

If you’ve been to restaurants or supermarkets, you’ve likely noticed that when the cashier selects “Card” or “UPI” as the payment option, the POS machine activates automatically, processing the payment without any manual input. This seamless experience is made possible by a Razorpay feature called POS Bridge. Interestingly, POS Bridge is particularly useful when an app isn’t installed directly on the POS device but still needs to trigger transactions across various payment methods. Since Razorpay’s official documentation begins with POS Bridge, it immediately caught my attention and led me to explore it as a solution.