AWS

import { S3Client, PutObjectCommand } from '@aws-sdk/client-s3';
import { getSignedUrl } from '@aws-sdk/s3-request-presigner';

const s3 = new S3Client({ region: 'us-east-1' });

const url = await getSignedUrl(s3, new PutObjectCommand({
  Bucket: 'my-bucket',
  Key: `uploads/${userId}/${filename}`,
  ContentType: 'image/jpeg',
}), { expiresIn: 3600 });

// Return URL to client — client uploads directly to S3 (no server bandwidth)

import { SESClient, SendEmailCommand } from '@aws-sdk/client-ses';

const ses = new SESClient({ region: 'us-east-1' });

await ses.send(new SendEmailCommand({
  Source: 'noreply@yourapp.com',
  Destination: { ToAddresses: [user.email] },
  Message: {
    Subject: { Data: 'Welcome!' },
    Body: { Html: { Data: '<h1>Welcome to YourApp</h1>' } },
  },
}));

import { DynamoDBClient } from '@aws-sdk/client-dynamodb';
import { DynamoDBDocumentClient, PutCommand, GetCommand } from '@aws-sdk/lib-dynamodb';

const client = DynamoDBDocumentClient.from(new DynamoDBClient({ region: 'us-east-1' }));

await client.send(new PutCommand({
  TableName: 'Users',
  Item: { userId: '123', email: 'user@example.com', createdAt: Date.now() },
}));

const { Item } = await client.send(new GetCommand({
  TableName: 'Users',
  Key: { userId: '123' },
}));