---
title: "Modify Amplify-generated Lambda resources with CDK"
section: "build-a-backend/functions"
platforms: ["android", "angular", "flutter", "javascript", "nextjs", "react", "react-native", "swift", "vue"]
gen: 2
last-updated: "2024-05-16T15:59:30.000Z"
url: "https://docs.amplify.aws/react/build-a-backend/functions/modify-resources-with-cdk/"
---

Amplify Functions utilize the [`NodejsFunction`](https://docs.aws.amazon.com/cdk/api/v2/docs/aws-cdk-lib.aws_lambda_nodejs.NodejsFunction.html) construct from the [AWS Cloud Development Kit (CDK)](https://aws.amazon.com/cdk/). The underlying resources can be modified, overridden, or extended using CDK after setting the resource on your backend.

```ts title="amplify/backend.ts"
import { defineBackend } from '@aws-amplify/backend';
import { myFunction } from './functions/my-function';

const backend = defineBackend({
  myFunction
})

// CDK constructs can be accessed via
backend.myFunction.resources

// where the Lambda function can be found on
backend.myFunction.resources.lambda
```

The Lambda resource available is a representation of [`IFunction`](https://docs.aws.amazon.com/cdk/api/v2/docs/aws-cdk-lib.aws_lambda.IFunction.html). 

## Adding IAM Policies

To learn how to add IAM policies to a Function's execution role, visit the [documentation for granting access to other resources](/[platform]/build-a-backend/functions/grant-access-to-other-resources#using-cdk).