Cristian S.

AI Voice Agent & AI Receptionist Expert | Complex Integrations

I’m Expert-Vetted (Top 1% on Upwork), and I specialize in building sophisticated, production-ready AI voice agents and AI receptionists that handle complex conversations, business logic, scheduling, integrations, and real customer interactions. Most AI voice agents are easy to demo. Building one that can reliably handle real customers, complex business rules, scheduling, transfers, integrations, edge cases, and thousands of real conversations is a very different problem. I design and build production-ready AI Voice Agents and AI Receptionists that can do much more than answer FAQs. They can: • Answer inbound calls naturally • Qualify leads and collect customer information • Book, modify, and cancel appointments • Check real-time availability • Integrate with booking systems, CRMs, APIs, and internal tools • Transfer calls based on business rules • Handle after-hours calls and schedule callbacks • Send SMS confirmations and follow-ups • Identify existing customers • Navigate complex conversation flows and edge cases • Speak multiple languages • Escalate to a human when needed The important part isn't just connecting an LLM to a phone number. A great AI receptionist needs to understand how the business actually operates. I map out the customer journey, business rules, integrations, failure scenarios, prompts, guardrails, transfer logic, scheduling logic, and fallback behavior so the agent behaves like a well-trained member of your team—not an AI experiment. I can help with: - AI Receptionist Development From simple inbound answering to sophisticated agents that manage complete customer workflows. - Conversation Design & Prompt Engineering Natural conversations, interruption handling, objection handling, information collection, guardrails, and edge cases. - API & Booking Integrations Connect your voice agent with appointment platforms, CRMs, calendars, databases, internal systems, or custom APIs. - Complex Call Logic Departments, working hours, transfers, callbacks, qualification rules, routing, escalation, and conditional workflows. - Existing Agent Improvement If you already have an AI voice agent but it sounds robotic, makes mistakes, gets stuck, or doesn't handle edge cases well, I can audit and improve it. My background is in both software engineering and technical product management, which is especially useful for AI voice projects. I don't approach these projects as "just prompt engineering." I look at the complete system: customer experience, conversation design, backend integrations, business logic, reliability, and what needs to happen before, during, and after every call. If you're trying to build an AI receptionist that will actually answer calls from real customers and become part of your business operations, I'd be happy to help.