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Giovanni Martina

📍 São Paulo

Vibecoding a Monthly Report View

Last time I showed how Gemini is able to extract structured data from Brazilian monthly FII reports. I've been iterating/vibe coding ways to display the dynamic report data within the Svelte frontend and hit on something that's interesting enough for the MVP version of the

Gemini is a Boss

I hooked Gemini 2.5 Pro into my ResumoFII pipeline to pull structured data from Brazilian FII (REIT) PDF reports downloaded straight from the B3 stock exchange. These PDFs can be long, full of details and can take a while to read. The goal is to convert them into clean

The Scheduler Loop: Job Queues and PDF Downloads

So I've got 466 FIIs (Brazilian real estate funds) seeded in a local test database. ResumoFII's purpose is to help rapidly summarize each fund's monthly report. The reports get published on B3's site, and we can download them automatically. The idea is

Building ResumoFII

This project started as a way to learn more about Rust – and to explore how Clean Architecture principles can help avoid getting trapped in a tangled backend mess. I chose Rust because I wanted to deepen my understanding of the language, and building a small project is my preferred way

One Hour

One hour per day is reasonable. It's a manageable amount of time alongside a busy work schedule, exercise, social life and everything else. It's small enough that it doesn't feel like a sacrifice, but consistent enough that real progress adds up over time. Over

29 Test FIIs Seeded into ResumoFII

Things have been moving in my free time. I scraped FII data from B3 and CVM, ran some Python transformation scripts, and seeded 29 funds into ResumoFII. The backend is Rust + Axum + SQLite. The frontend is Svelte + Tailwind. I manually tested some Gemini 2.5 prompts in Google AI Studio

I Invest in FIIs. Reading the Reports Is a Nightmare

I invest in more than 10 Brazilian FIIs (Fundo de Investimento Imobiliário). You can easily purchase them via your online broker. The funds pool investor money to invest in real estate assets either directly by buying properties and renting them out or indirectly by providing loans for residential or commercial

From Idea to Completion: Marupeke

0:00 /0:06 1× It's official–you can now purchase the beginner's edition of the Marupeke puzzle book for $9.99 on marupeke.today. Finishing this small project has been very satisfying. It gave me a taste of the focus that comes with deep work

From JSON to Playable Marupeke Puzzles

Marupeke puzzles are not the most challenging or elaborate games, but there's something satisfying about creating a Rust algorithm (as a Rust noob) to generate hundreds of these puzzles. Over the past few months, I've been working on creating these puzzles programmatically during the weekends and

From Code to Play: Bringing Marupeke to Life

How Rust, multi-threading and JSON bring interactive marupeke puzzles closer to reality.