I'm Renildo, and I build things for the web.

I'm the creator of Yumma CSS. I'm all about the look and the functionality, so I usually build everything, from the framework to the apps.

Projects

Where I've been spending my time.

Concentrix Lisboa, Portugal

Apr 2026 – Present

Help customers over voice, email and chat: clear answers, clean handoffs when something needs more digging.

Yumma CSS Barreiro, Portugal

Oct 2023 – Present

Lead Yumma CSS and Yumma UI: the framework, the components, the docs, and the tooling around them.

The short version.

I love building open source projects, and most of what's in them exists because I wanted to use it and it didn't exist yet.

You can find me on GitHub, or say hello on Twitter.