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Building client-side applications for production systems. Covers frontend architecture, state management, API integration, deployment considerations, and patterns for connecting UIs to cloud backends.

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Day 12: Deploy your frontend (with authentication)

· 48 min read
Norah Klintberg Sakal
Norah Klintberg Sakal
AI Consultant & Developer

Deploy your frontend (with authentication)

What you'll learn

How to build a secure frontend with Vite, React and Cognito authentication, then deploy it to S3 + CloudFront

Protect your app from unauthorized use​

Days 9-11: You built the infrastructure

Today: We build the protected frontend

Here's the critical security issue:

When you deploy your AI calling agent:

https://app.yourdomain.com
→ Publicly accessible
→ Anyone can use it
→ Could rack up huge OpenAI/Twilio bills

This is not acceptable.

What you need: