Real-Time AI Developer – Virtual Receptionist VoIP Powered by OpenAI (ChatGPT) - Contract to Hire

Description: We are looking for an experienced developer to create Receptia, a virtual receptionist capable of answering phone calls in real time, powered by OpenAI / ChatGPT. The system must understand and respond fluently in Québec French and Canadian English, with speech-to-text (STT), natural text-to-speech (TTS), and VoIP/SIP telephone integration. Phase 1 Objectives: Receive VoIP calls Connect to OpenAI (ChatGPT) API Natural STT/TTS Automatic FR/EN language detection Simple interface to configure responses and scripts Call conversation logging Requirements: Experience with OpenAI API Knowledge of VoIP/SIP Low-latency real-time development Multilingual support Full Version (Detailed Job Post) Title: AI Virtual Receptionist Development – Receptia, Powered by OpenAI (ChatGPT) Description: We are launching Receptia, an intelligent phone assistant for SMEs and freelancers. The goal: automatically answer incoming calls with a natural voice, understand the caller’s request, and take action (reply, schedule an appointment, transfer, send information). ⚠️ Key Requirement: The conversational engine must absolutely be powered by OpenAI / ChatGPT via API (GPT-4o or GPT-5). We require the conversational quality and contextual understanding of ChatGPT—no other LLM will be accepted as the main engine. Phase 1 Features: Receive VoIP/SIP calls Integrate OpenAI (ChatGPT) API for intelligent handling Real-time speech recognition (Whisper, Deepgram, etc.) Natural text-to-speech (ElevenLabs, Azure TTS, etc.) Automatic detection of Québec French / Canadian English Simple web interface to manage scripts, responses, and logs Audio + text conversation logging Option to transfer to a human operator Phase 2 Features (Optional): CRM integration Appointment scheduling (Google Calendar / Outlook) Automatic SMS/email sending Caller recognition for returning customers Preferred Technologies: OpenAI API (mandatory) STT/TTS: Whisper, Deepgram, Azure, ElevenLabs VoIP/SIP: Twilio, Asterisk, or equivalent Backend: Python, Node.js Frontend: React.js, Vue.js Database: PostgreSQL, MySQL, MongoDB Ideal Candidate Profile: Proven experience with OpenAI API integration Strong knowledge of VoIP/SIP and telephony integrations Expertise in advanced STT/TTS systems Low-latency real-time development experience Skilled in multilingual FR/EN handling Estimated Timeline: 4–8 weeks for Phase 1. Apply tot his job Apply To this Job