RGRicardo Guia
PT/EN
Substack
Ricardo GuiaRicardo GuiaProduct · Education · Artificial intelligence

I build to learn, and write as I go.

I’m a builder at heart. My work sits between product and education, and I build with AI to understand where work is heading. I share what I learn along the way.

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Product, education, and AI in practice.
Passei DiretoGuia BrainInteligência à Brasileira

From the Lab

Ideas I put into practice.

Tools, games, and experiments I’ve built over time to learn by doing.

Guia Brain previewGuia Brain
01Personal intelligence system

Working system

Guia Brain

A local-first AI memory system that keeps context, decisions, and knowledge available to the models you already use.

Open
Behind the build

Guia Brain

A local-first AI memory system that keeps context, decisions, and knowledge available to the models you already use.

Why I built it

I switched models and realized that months of context were stuck in the previous service. I started Guia Brain to solve that problem.

What I learned

You will switch models many times and your memory needs to remain yours.

Findli previewFindli game scene
02Playable AI product

Playable game · beta

Findli

A hidden-character game built around richly detailed scenes. Play weekly challenges, compete, or turn a photo into the character your friends have to find.

Open
Behind the build

Findli

A hidden-character game built around richly detailed scenes. Play weekly challenges, compete, or turn a photo into the character your friends have to find.

Why I built it

I wanted to test personalization as part of the fun. Instead of only configuring a game, the person becomes part of the scene.

What I learned

Personalization creates the surprise; recurring challenges, fair difficulty, and competition keep the experience alive.

Explore the Lab

Latest writing

What I’m writing.

From my Substack

01
Ricardo Guia

My AI agent dreams while I sleep

Contaminated memory, automatic consolidation, and why I built a second brain that does not depend on any one service.

02
Ricardo Guia

An AI agent lives in my house now

It has a name, a personality, and a heart that beats on its own. Three things I learned after finally leaving the theory behind.

03
Ricardo Guia

Build for agents

The next user of your product may be a machine.

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Ricardo Guia

About

I like building things and making them work.

I have worked with digital products for fifteen years. Today I run one of Brazil’s largest edtech companies and use AI every day to expand what one person and one team can do.

Read my story

Selected press & talks

A few conversations elsewhere.

Interviews and talks about education, product, careers, and artificial intelligence.

SBT News2026PressA new platform brings multiple AI models to studentsQuoted on PasseIA Lite and helping students choose the right AI tool for each learning need.VOCÊ RH2026PressCareer cushioning: building a professional plan BQuoted on AI, career uncertainty, and why professionals are continuously building new skills.SBT Brasil2025TV / videoYoung Brazilians prioritize stability and public-service careersA televised interview about a 12,843-student survey and why young Brazilians are prioritizing career stability.SBT News2025PressPublic-school students gain free access to an English courseQuoted on expanding access to English learning for public-school students in Cotia.Conecta SC2025Press75% of students value stable employment with labor protectionsQuoted on the value of degrees, public-service careers, and digital creators in the education ecosystem.ABC da Comunicação2024PressReal stories of people who reinvented themselves through educationQuoted on Passei Direto’s first social-proof campaign and education as a force for change.HACKTUDO2020TV / videoBuilding a successful product-led growth strategyA product-led growth panel featuring Ricardo Guia, then VP of Product at Passei Direto, at the HACKTUDO festival.HACKTECH2018TalkThe path to becoming a Product Manager — and its biggest challengesA talk in HACKTUDO’s Product & UX conference track.
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