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Gustavo Maia Castelo Branco

I run a fleet of motorcycles in Braga and I am studying International Relations at the same time. Software happens in between. This is where I put the things that made it out of my computer.

  • Braga, Portugal
  • Motofast · mobility solutions
  • Available for projects
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The ground

I do not have a method with a nice name. I have a habit: before touching anything, I spend time watching how it behaves on its own. Only then do I build, and I start with the smallest version worth testing. It is slow at the start. It saves months later.

Product and software

Sites and apps that ship and stay shipped. Next.js, React Native, Supabase, Vercel. I am especially fond of the part nobody puts in a portfolio: the SEO, the accessibility, the infrastructure bill at month end, and the button the owner presses at seven in the morning to change a price without having to call me.

  • Next.js
  • React Native
  • Supabase
  • Vercel
  • Postgres
Mobility and operations

Motofast is the project that eats my days. A mobility solutions company: we rent motorcycles to couriers who do not have four thousand euros lying around, and we run a delivery operation on the same fleet. I learned more about software running this than from reading documentation. A system only really exists once it has survived a Monday morning.

  • Fleet
  • Delivery
  • Operations
  • Platform
International Relations

First year at the University of Minho. I went in because I wanted the large-scale version of the questions I ask the operation at month end: who decides, on whose incentive, and what changes when the incentive changes. It still strikes me as the most interesting subject there is.

  • Geopolitics
  • Institutions
  • Research
  • Writing

Selected work

Three things that exist outside my computer.

Motofast home page, headlined “the ecosystem that moves Portugal”, with links to the solutions and the app.
My companyOngoing

Motofast

A courier needs a motorcycle to work and four thousand euros do not appear out of nowhere. Motofast rents them one, covers maintenance and insurance, and runs a delivery operation on top of the same fleet.

What I did

  • Fleet rental to couriers, maintenance and insurance included
  • Our own delivery operation running on that same fleet
  • Internal platform for fleet, rentals and compliance

StatusOperating in Portugal. Android app shipped, iOS on the way.

motofast.pt
QuantaLabs home page, headlined “diagnosis before code”, with a chart comparing a manual process against one with a system.
ConsultancyOngoing

QuantaLabs

Almost everyone who asks for software already knows what they want to build and has not yet looked at where the day actually goes. QuantaLabs does the diagnosis first: understand how the operation runs, then talk about building.

What I did

  • Positioning, identity and site, first sketch through to a live domain
  • Operational diagnosis inside small businesses before proposing automation
  • Analytics only on consent — the site works the same if you decline

StatusWorking with small businesses in Portugal.

quantalabs.com.br
Menu priceStays in the house · 13%
Ingredients
31%
Labour
26%
Fixed costs
17%
VAT
13%
Margin
13%
Illustrative breakdown of a €14.50 dish — the shape the product returns, not a client's figures.
Own product2026

Margem

The restaurants closing around me rarely close for lack of customers. They close on margin. Margem works out the true cost of every dish and shows where the profit is walking out.

What I did

  • MVP on Next.js and Supabase, authentication included
  • Pain validated against public sector data, not intuition
  • Seven Portuguese competitors mapped before a line of code

StatusWorking MVP. Looking for the first paying customer.

Writing

I write to understand first. If it ends up useful to someone else, better.

Video essays

Cartografia

Some games build an entire world and then leave you inside it to work out on your own what it means. Cartografia is a channel about those worlds, read through philosophical and psychological lenses. Deliberately untechnical — I care why a world convinces, not how it was assembled.

Scripts written, production starting

Course notebook

International Relations

I keep a whole notebook for the degree: courses, authors, concepts, cases, bibliography. I am opening it in public as I write it, so anyone taking the same courses can use it.

Open the notebook

Opening through the academic year

Shall we talk?

If you run a business that needs to exist online properly, or you have a project where this particular mix of things is handy, send an email. I always reply.

ola@gustavomaiacastelobranco.pt