Bernardo de Paula Carvalho
WhatsApp AI Automation Expert | n8n, Python/FastAPI
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AI Stock Portfolio Selector — Random Forest on IBOVESPA 📈🤖
ML model that reads company fundamentals and classifies stocks as Buy / Hold / Sell — building a data-driven portfolio from Brazil's IBOVESPA index (77 companies, price data Dec 2012–Apr 2021).
8 classifiers benchmarked; Random Forest won on precision and was tuned with GridSearchCV. Result: the model's portfolio returned +4.6% in a quarter while the IBOVESPA fell ~3%.
Capstone project of the Data Science program at Digital House Brasil. Stack: Python, scikit-learn, pandas.
#machinelearning #datascience #python #fintech #randomforest
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Predictive Macro Risk Engine — Institutional Real Estate
Interactive dashboard that consolidates macroeconomic indicators (rates, inflation, credit, demand) into a composite risk score for real estate portfolios — with dynamic category filtering, a sensitivity matrix, and a strategic mitigation playbook.
Economist-designed: macro analysis turned into a practical decision tool. Bilingual (EN/PT), single-file, runs anywhere.
Built for asset managers, credit teams, and strategy analysts.
#dataviz #riskmanagement #realestate #economics #dashboard
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Aluguéis Justos SP — ML Rent Price Simulator for São Paulo 📊🏠
Machine Learning model that simulates fair rent prices across São Paulo under three economic scenarios (Optimistic, Base, Downturn) projected through 2030.
Stack: Python, XGBoost, FastAPI, PostgreSQL, AWS. Working prototype trained on real São Paulo listing data, with public API (Swagger docs).
Built for renters, landlords, and investors who need data-driven price benchmarks instead of guesswork.
#machinelearning #datascience #python #predictiveanalytics
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ChefLú — WhatsApp AI Sales Agent for a Bakery 🥐🤖
Built "Clara", an AI agent that handles customer conversations on WhatsApp — automated menu delivery, order organization, and Pix checkout support, from first contact to confirmed order.
Stack: n8n workflows + Evolution API + Python/FastAPI + OpenAI. Production-grade with retries, idempotency, and monitoring. Deployed and running with a real client.
Result: instant replies 24/7, fewer lost leads, organized orders, and a higher close rate.
#whatsappbot #aiautomation #n8n #fastapi #aichatbot
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