AI-Powered Application & Backend Developer

I am looking for freelance projects involving **AI application development, Python backend development, RAG systems, voice AI, chatbots, API development, and business automation**. I specialize in building practical AI-powered applications using: - Python & FastAPI - AI agents and conversational AI - RAG and knowledge retrieval systems - PostgreSQL, pgvector & Redis - REST APIs and WebSockets - Speech-to-Text and Text-to-Speech - Voicebots and telephony integrations - WhatsApp and Google Calendar integrations - SQLAlchemy & Alembic - Automated testing with pytest - Git & GitHub ### What I can build **AI & RAG** - Custom AI chatbots - Document-based RAG systems - Knowledge-base assistants - AI agents - Business AI automation **Voice AI** - AI receptionists - Multilingual voice assistants - Voicebots - Speech-to-text / text-to-speech systems - Real-time audio applications - Telephony integrations **Backend Development** - FastAPI applications - REST APIs - WebSocket applications - PostgreSQL database systems - Redis-based services - Third-party API integrations - Authentication and business logic **Automation** - Appointment booking systems - Customer notification systems - WhatsApp automation - Calendar integrations - Lead capture - Post-call processing ### Relevant Project I developed **Vaani**, a multilingual AI voice receptionist backend supporting English, Hindi, and Hinglish. The project combines FastAPI, RAG-based knowledge retrieval, local speech processing, PostgreSQL/pgvector, Redis, WebSockets, Exotel telephony, WhatsApp integration, Google Calendar, Docker, and automated testing. I am interested in working with clients who need a **custom AI solution rather than a basic chatbot**, including startups, businesses, researchers, and developers looking to integrate AI into an existing product. I can work on both **complete projects and individual development tasks**, including debugging, API development, AI integration, backend development, and deployment preparation.