Uploaded September 2020 | Updated September 2026, 4 hours ago

---

In this episode, Avdi shows the architecture for payments working in the penguin-feeding app using Square In-App Payments SDK. You will learn why you want to create a backend web service for handling pricing, payments, and processing. To make this backend service, the application will use AWS Lambda with AWS API Gateway for communicating with the Flutter application.

Flutter – https://flutter.dev
Square In-App Payments SDK Flutter Plugin – developer.squareup.com/docs/in-app-payments-sdk/flutter

Square Developer Forums – developer.squareup.com/forums
Square Developer Community – https://squ.re/slack
Square Developer Twitter – twitter.com/squaredev
Square Developer Blog – developer.squareup.com/blog