In Chapter 3, Designing a Kotlin Serverless Application, we analyzed our app requirements and jotted down all the APIs that we need for app development. Also, we described the UI part. In this chapter, we are going to design an app that has end-to-end integration with the AWS instance. We will demonstrate how using Kotlin, both on the client side and on the AWS infrastructure side, will benefit you. We will learn a lot of cool tricks in Kotlin, which save time and reduce the amount of code.
In this chapter, we will learn about the following:
- Configuring the AWS Cognito pool, which we will use for user authentication
- Code lambda functions, which will keep all our business logic
- Making lambda talk with our persistence layer to store the data on the cloud
- Our companion app, which is in Android, and we will learn a bit of Android as well