Build PayPal Checkout in Android Jetpack Compose + Firebase

In this episode, we complete our Android Food App by integrating PayPal payments from end to end. This is not just UI — this is a real-world, production-style payment flow used in modern mobile apps. 🚀 What you’ll learn: • How to create PayPal sandbox accounts (Buyer & Seller) • Setting up a secure backend using Firebase Functions • Creating PayPal orders from your server • Integrating PayPal Web Checkout in Android • Handling deep linking back into your app after payment • Capturing payments securely • Automatically clearing the cart after successful checkout 💡 By the end of this video: You’ll have a fully working payment system inside your Android app — from cart → checkout → PayPal → success. 🛠 Tech Stack: • Kotlin + Jetpack Compose • Firebase (Authentication + Cloud Functions) • PayPal Web Payments SDK • Retrofit + OkHttp • MVVM + Clean Architecture ⚠️ Important Note: We are using PayPal Sandbox for testing — make sure your buyer & seller accounts use the same currency (USD recommended to avoid errors). 🔥 This is Episode 9 (Final Episode) of the series: If you followed along, you now have a complete food ordering app with real payment integration. 👉 Go here for full series: https://www.youtube.com/playlist?list=PLjL1sOXJl22E2cFwZr_yypnPytPfVSUJY 📺 What’s Next? In the next series, we’ll level up: • Build a REST API with Ktor • Implement JWT authentication • Consume it using Kotlin Multiplatform (Android + Web) 👉 Subscribe and turn on notifications so you don’t miss it. #AndroidDevelopment #JetpackCompose #Kotlin #PayPal #MobileDevelopment #SoftwareEngineering #Firebase #CleanArchitecture