leo. Let's talk
Frontend engineer

Leonardo
Lemos.

I build interfaces with care.
And the systems behind them.

Build something with me
Currently at Credo AIPreviously AB InBev

MadridES

Where I call home.

Cobblestone street between pastel façades on Calle de Afonso VI, Madrid Through my lens

AB InBev · Web performance

8× faster

Cut time to first visible content
from 6.4 seconds to 0.8 seconds.

Native Mac notes

Madrid

A little room to think.

Madrid Mac app with a note open in its writing editor
Linked ideas. Local-first. Cloud sync.Live
A terminal for coding agents

Termi

Your next idea starts here.

macOS · Open sourceLive

Always building.

@mrlemoos ↗
3,773 contributionsPast year on GitHub

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Updated 7 Oct 2026
LessMore

The next good thing

Starts with
a hello.

Start a conversation Talk about a role ↗
Open-source TypeScript

Grabkit

HTTP, with fewer surprises.
Shared money for couplesIn progress ↗

plan/ria

Money. A little more together.

 A Madrid street lamp framed by green leavesLook up

Thinking out loud.

All writing ↗
On the blog

Agentic Engineering Is How You Stop AI Wrecking Your Codebase

On the blog

The Bill for the Code Nobody Asked Me to Write

On the blog

Juniors, You Have to Earn AI

A yellow sign half hidden by plants beside a bench in Madrid@don.leo.lemos
Care in the details. Curiosity everywhere.See my code ↗me@mrlemoos.dev ↗