Want to see a startup from the inside, before it gets big?
We're Kuup Studio.
We build Business Brain, a Mac app that gives Claude or ChatGPT a long-term memory of your business.
Every email, quote, file and decision is kept in one folder on your Mac, so the AI can finally answer "wait, what did we agree with that supplier in March?"
Right now we're four people: three students and one software engineer.
We're at €20,000 ARR, still growing, and moving fast.
We're looking for a fifth.
Part-time, hybrid in Madrid, starting as soon as possible.
What you'd actually do
Talk to business owners and find out what eats their week
Bring what you hear back to the team, then watch it get built
Test new features before anyone else does (and break them, politely)
Help make tutorials and help pages that people actually read
You're probably a fit if




You're in Madrid.
Studying business, computer science, design, communications, something else, or not studying at all
You already use AI tools every day and have opinions about them
You write clearly in English (Spanish is a bonus)
You'd rather figure something out than wait to be told
What you get
A front-row seat to building a startup from the very start: customers, product, pricing, all of it
A small team where your ideas end up in the product
Very strong opinions about fonts, free of charge
Pay: let's talk about it privately
Not looking for an internship?
Have a look at Business Brain anyway (kuupstudio.com)
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📌 Student Intern (España)
🏢 Kuup studio
📍 España