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How to build a complex app with Emergent AI

5.4K views· 125 likes· 12:26· Jan 28, 2026

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This video is sponsored by Emergent. Try Emergent here: https://app.emergent.sh/?via=nocodemba Most AI app tutorials show you how to build simple to-do lists or habit trackers. In this tutorial, I'm building something actually complex: a two-sided marketplace like Airbnb using Emergent. ou'll see the entire process from initial prompt to deployed app, including building the frontend, adding a real backend with database, fixing bugs, and publishing live. What You Will Learn - Building a complex two-sided marketplace from scratch with Emergent - Using ultra thinking mode and model selection for better results - Creating user authentication with different user types (owners vs renters) - Building frontend mockups and testing before adding the backend - Integrating MongoDB database and 20+ API endpoints automatically - Debugging common issues like image uploads and session management - Testing the full user flow from both renter and owner perspectives - Deploying your app live with Emergent's one-click deployment and custom domains CHAPTERS: 00:00 Sponsor message 00:10 Setting up Emergent 01:14 Building the Frontend 03:55 Building the Backend 06:05 Testing and Debugging 10:17 Deployment 11:42 Conclusion and Next Steps

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