Luciano Guimarães
Co-founder · Engineer
@guimaraesp
Sapphire Labs
A non-profit learning initiative run by a couple — not a company. We build fantasy apps together to explore new technologies, sharpen what we already know, and pass along what we've picked up in the industry, mentorship-style.
About us
We believe the day-to-day inside tech companies is full of rich experiences, questions, and ideas we rarely get to explore on the clock. We are two people in love with continuous learning, looking for a space to put everything we know — and everything we want to know — to the test.
The idea is simple: pick a fantasy product and run it end to end. Architectural vision, decision-making, and the granularity of the code itself. We hold sync meetings, split tasks, and mimic the rhythm of a company — just looser, lighter, and driven by curiosity.
- Next.js
- React
- TypeScript
- Node.js
- React Native
- PostgreSQL
- UI/UX
- Cloud
- Vert.X
- Java
- Quarkus
- Spring
- Spring Boot
- AWS
- Playwright
Projects
A glimpse of what we are building.
Super Fantasy
In progressA fully custom fantasy game to play with friends, with custom bets between players where the house keeps nothing.
- React Native
- Vite
- PostgreSQL
Dog Bet
In progressBetting system whose core powers the Super Fantasy app.
- React Web
- Vite
- MongoDB
- PostgreSQL
- Spring
- Kotlin
Light.X
In progressA clone of Eclipse Vert.X, focused on its core features.
- Maven
- Java