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Nikhil Singh

Software Developer |... • 13h

5. Delivery The response is written to Firestore, triggering a final Cloud Function. We use Hostaway REST APIs to push the message back to the specific OTA (Airbnb/Booking.com) thread. The Tech Stack: ・Backend: Firebase Functions, Firestore, Node.js ・AI/ML: Vertex AI, Gemini 2.5 Flash & 2.0 Flash ・Search: Google Discovery Engine (Vector Search) ・Storage: Google Cloud Storage ・External Integration: Hostaway API + Webhooks Why this matters: Most AI agents hallucinate because they rely on the model for knowledge. This system relies on verified documents; the model is just the interface. Guests get instant answers, and support teams scale without increasing headcount. Thanks for reading

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