This project is an example of a fullstack development combining an AI agent FastAPI python backend with a custom frontend widget written in javascript. Using Python, FastAPI, and models like OpenAI and Claude, the system guides users through a natural conversation in Polish, collects their housing preferences, and recommends the best-matching apartments from the client’s database.

A Polish real estate company partnered with me to turn their raw listings into a smart digital agent that qualifies leads, recommends properties, and sends contact details directly to their sales team, so that they can connect the lead and close it within seconds, knowing their preferences.

Leads leaving the website without sharing their contact information

Unqualified leads reaching out to the real estate company

Capturing high-quality leads without adding friction

Seamlessly connecting the backend to the frontend with the speed of chat to engage visitors

AI Agent Backend (Python & FastAPI) Developed an AI agent backend in Python and FastAPI that interprets user queries, collects preferences (location, budget, size, parking, avoiding city center, etc.), and scores apartments based on structural data and business rules. The backend connects to the client’s API to fetch and periodically update available listings.

Matching Logic & Fallbacks Implemented a robust matching engine that ranks offers, handles edge cases when no perfect match is found, and applies clear fallback logic so users always receive relevant suggestions instead of dead ends.

JavaScript Widget Frontend Built a lightweight JavaScript chat widget that can be embedded directly on the client’s website. The widget provides a smooth conversational interface, sends messages to the backend over secure APIs, and displays personalized apartment recommendations in real time.

Custom Integration & Lead Capture Integrated with the client’s existing systems using Node.js and REST APIs. The agent saves qualified leads directly into Supabase, ensuring the sales team receives structured contact data and user preferences without manual copying.

📌 Fullstack development (Python, FastAPI, JavaScript, Supabase) 📌 AI agent development (OpenAI, Claude, Pydantic) 📌 Real estate data integration and matching logic 📌 Custom website widget and frontend integration 📌 Lead capture and Supabase integration 📌 Architecture design & technical consulting

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