/projects · 15

Projects

Systems I built and keep running, AI tools for software development, and data studies.

Highlights

2026 · fastapi · postgresql · react · pwa · claude

Lastro — Real Estate CRM

CRM for Brazilian real estate agencies: lead inbox that measures time to first response, sales and rental pipelines, visit scheduling, a property portfolio that matches buyers automatically, and a sales grid for new developments with reservations and price tables. Multi-tenant on Postgres row-level security, installable as an offline PWA, with an AI assistant (Claude or Gemini, on each user's own key) that proposes actions for the agent to confirm.

demo

2023 — 2026 · flask · react · postgresql · pandas · cvm open data

InvestLink — Explainable Investment Screener

Brazilian stock and REIT screener that scores each asset against its own sector and shows the case for it and the warning against it, side by side. Fundamentals come from audited CVM filings, reconciled against market data, with a backtest that shows its survivorship-bias caveat.

demo github

2026 · next.js · fastapi · duckdb · postgresql · claude

Vizion — AI-Assisted BI

Business intelligence without SQL: upload a spreadsheet or connect a database, ask questions in plain language and get charts, drag-and-drop dashboards, semantic models with YTD/MoM/YoY measures, no-code ETL pipelines and AI-written reports. Users bring their own Claude or Gemini key.

demo

2026 · python · duckdb · pandas · numpy · streamlit · github actions

Swing Quant — Trading System & 16-Year Study

Quantitative swing-trading system for Brazilian and US equities — walk-forward, out-of-sample, Monte Carlo and cost-stress validation, with automated daily screening — plus a 16-year data study on whether running it actually beat investing. 2.3M daily bars, 26 asset classes, and the finding that most of the apparent edge was interest on idle cash.

study github

Tools and apps

2026 · next.js · prisma · nextauth · gemini · electron

ARIA — AI Personal Assistant

Personal dashboard with an AI assistant that turns text or voice into calendar events, tasks and notes through Gemini function calling. Weekly agenda with recurrence, global search, browser notifications, Google Calendar sync and a desktop overlay in Electron.

demo github

2025 · react · nestjs · python · fastapi · bullmq · postgresql · redis

Tradelink — Trading Analysis Platform

Full-stack web platform for traders: trade journal with P&L, R:R, Sharpe/Sortino and psychology tracking; multi-indicator backtesting engine (up to 15 indicators) with async BullMQ queue; DCA simulator; Volume Profile (POC/VAH/VAL); and market scanner with alerts.

demo github

2025 · claude code · bash · python · tui

AI Dev Kit

Full AI bootstrap for any project — spec-driven workflow, real-time quality auditor, TUI for feature lifecycle management, AI-powered smart commits, and Claude Code hooks. Detects your stack and configures everything with one command.

site github

2025 · typescript · node.js · claude code · cytoscape.js

archlens-ai — Architecture Visualization

CLI tool that points at any codebase and generates a self-contained HTML report with an interactive architecture graph, health scores, anti-pattern detection, dependency cycle detection, and refactoring suggestions, powered by Claude Code.

site github

2024

Ghost Doc

Automated documentation tool that instruments functions with decorators to capture calls, arguments, return values, and generate live interactive flowcharts.

github

FastAPI · PostgreSQL · Redis Cloud Native Task Platform

2025 · fastapi · postgresql · redis · docker · ci/cd

Cloud Native Task Platform

Production-ready cloud-native task management platform built with FastAPI, PostgreSQL, Redis, Docker, and a full observability and CI/CD stack. Designed to demonstrate scalable backend architecture, background processing, DevOps practices, and SRE fundamentals.

github

2025 · react native · expo sdk 54 · typescript · sqlite · fastapi · whisper

Gastô — Personal Finance App

Native Android app for personal expense tracking with voice and natural language input, offline AI category classification (TF-IDF + LinearSVC in TypeScript), local SQLite storage, and visual monthly reports — no internet required.

site

Data science

2024 · python · pandas · kaggle

Food Prices vs. IPCA

Investigates the relationship between food prices and the Brazilian IPCA inflation index, uncovering patterns and identifying notable variations.

kaggle

2023 · python · kaggle

Credit Card Fraud Detection

Machine learning model to detect fraudulent credit card transactions, comparing classification techniques.

kaggle

2023 · python · kaggle

House Price Prediction

Kaggle competition: data exploration, preprocessing, and model training to predict house prices.

kaggle

2023 · python · pandas · kaggle

Long-Term Investment Comparison

Performance evaluation of various Brazilian investment assets across different time periods.

kaggle