# Felipe Ribeiro

> Felipe Ribeiro (felipefrf.com) is an AI engineer based in São Paulo, Brazil. He is a founding engineer at a stealth AI startup, the founder of MedAlvo, and an aerospace engineering student (data science minor) at Instituto Tecnológico de Aeronáutica (ITA), expected to graduate in December 2027. He builds LLM agents for production settings where wrong answers are expensive.

## Work

- Stealth AI startup, Founding Engineer (Sep 2026 to now, San Francisco, remote): building Milo, a peer-to-peer personal AI for teams where each employee's agent runs in its own Linux microVM. Teams and Google Chat integrations, a credential vault for the hosted browser agent, eval-first shipping.
- NG.CASH, Product Engineer (Jan 2026 to Sep 2026, São Paulo, remote): WhatsApp debt-negotiation agent with deterministic pricing in code (0 leaks across a 34-attack prompt-injection battery), payroll re-platform on GCP Cloud Run, judicial-notification triage automation.
- Credix, ML Engineer, Credit & Risk (Jul 2025 to Jan 2026, remote): XGBoost and logistic-regression credit models in production.
- Earlier: Safra (US Equities Summer Intern, 2025), BTG Pactual (Automation Engineer Intern, 2024), XP Inc. (Product Control Summer Intern, 2023–24), CNPq undergraduate ML research (2023–24).
- LinkedIn, Sales Strategy Intern, Data & AI (Feb 2025 to Jul 2025, remote): LLM chatbot over Salesforce CRM data for US & Canada sales forecasting.

## Projects

- [Curo](https://felipefrf.com/curo/): WhatsApp-first patient-care layer for Brazilian specialists and clinics (Google ADK, Gemini, Postgres). Co-founded with his brother; interviewed with Y Combinator.
- Flight Price Finder (in progress): finds the cheapest routes including hidden-city fares; being connected to live Google Flights data.
- [Ápice](https://software-house-six.vercel.app): software house run with his brother (ITA + MIT); clients include Império Eventos (logistics control tower and field app).
- [MedAlvo](https://medalvo.com.br): adaptive prep platform for Brazilian medical residency exams (FSRS v6, Thompson Sampling, 2PL IRT, Bayesian Knowledge Tracing; FastAPI, Postgres/pgvector, Cloud Run). Founder.
- [penpad](https://github.com/felipefrf/penpad): open-source tool that turns Markdown + LaTeX notes into realistic handwritten PDF/PNG pages for tablets. Project page: https://felipefrf.com/penpad/
- [Editable Pets](https://github.com/felipefrf/editable-pets): macOS desktop companion for Claude Code and Codex sessions.
- [yt-to-md](https://github.com/felipefrf/yt-to-md): YouTube video to structured Markdown for AI agents, no API key.
- [dual-subtitles-extension](https://github.com/felipefrf/dual-subtitles-extension): Chrome extension with two synced subtitle languages on YouTube.
- [x-reset](https://github.com/felipefrf/x-reset): bulk-delete old tweets from an official X archive.

## Leadership

- President, ITA Jobs Commission (2023–2024): ran Brazil's largest countryside career fair, 1,800+ attendees.
- Co-founder, Iniciativa Feynman (2019–2021): 81 volunteers, 350+ public-school students taught for free during COVID.
- Multiplicador, Fundação Estudar (2024).

## Honors

- Iberoamerican Physics Olympiad: 1st place overall (top gold)
- Nordic-Baltic Physics Olympiad: silver medal
- 50+ national olympiad medals (2017–2020), including 3× gold in physics (OBF), 2× gold in robotics (OBR) and gold in math (OBMEP)
- 2nd place, Nameless Hackathon (2025)

## Contact

- Email: felipe.frf27@gmail.com
- GitHub: https://github.com/felipefrf
- LinkedIn: https://www.linkedin.com/in/felipe-farias-ribeiro