Summary
Fahd Mirza walks through building a production-ready voice agent on Retell AI, a platform positioning itself as the leading voice agent solution for call center automation. The tutorial covers creating an agent from scratch inside Retell’s single-prompt interface, writing a system prompt with hard guardrails, and attaching a custom knowledge base — all demonstrated by building a FIRE (Financial Independence, Retire Early) education assistant that handles questions about early retirement and safe withdrawal rates.
The live test call highlights two capabilities Mirza emphasizes: graceful mid-response interruption handling and strict adherence to configured boundaries — the agent correctly declines to give personal financial advice and redirects to a licensed professional. The tutorial also covers voice selection (Kate, Ryan, Teemo), Retell’s analytics dashboard tracking call counts, duration, latency (1,200ms in the test call), concurrency, and user sentiment, as well as an AI quality assurance system that scores every call automatically on audio quality, hallucinations, resolution, and sentiment.
Enterprise-readiness features covered include 99.99%-plus uptime guarantees, auto-scaling, live call monitoring, webhook-based alerting for payment failures or concurrency spikes, and native integrations with Salesforce, HubSpot, and other CRM platforms. For developers evaluating voice agent infrastructure, this video delivers a concrete end-to-end walkthrough from agent creation through deployment and operational monitoring on the Retell AI platform.
📺 Source: Fahd Mirza · Published August 27, 2026
🏷️ Format: Tutorial Demo
