Open to internships and interesting projects.
Student & Software Developer
Exploring AI, cybersecurity, and software engineering.
Selected work / real systems
Privacy tooling, realtime collaboration and the engineering decisions behind them.
Privacy engineering
A local-first tool for metadata analysis, provenance inspection, privacy cleaning, and verification.
Files can contain metadata and provenance information that reveals more about their origin, creator, device, software, or workflow than people expect.
Realtime product
A shared game-list application for groups deciding what to play together.
Groups often spend more time deciding what to play than actually playing.
he/him · São Paulo, Brazil
I’m Guilherme Sabatini, a student and software developer based in São Paulo, Brazil. I enjoy building useful software, understanding how systems work, and exploring artificial intelligence, cybersecurity, and software engineering.
Outside of code, I’m interested in economics, investments, games, series, music, languages, and books. I like learning how technology, strategy, systems, and people interact.
Working stack / learning edge
Current tools are separated from what I’m actively exploring. No proficiency scores — projects carry the evidence.
Source trace / public code
Public owner repositories, ordered by most recently updated (up to four shown).
GitHub data ·
guisba/DataBreaker
Local-first metadata analysis, provenance inspection, privacy cleaning and verification.
From the READMEguisba/DataBreaker
Local-first metadata analysis, provenance inspection, privacy cleaning and verification.
From the READMEguisba/Listed
Shared game lists for groups that want to decide what to play.
From the READMEUseful source links
Beyond code
I’m interested in how systems behave — whether that means software architecture, a game’s strategy, a language, or the way markets and incentives move.
Online identity / Discord
Gui
afk.lol
Public identity · graceful static fallback
Music / public profile
Music is part of the personal side of this portfolio. No fake “now playing” state — just the real profile.
Open Spotify