ABOUT · A LUCKY LIFE

I've been bendecido.

I don't think I can tell my story honestly without starting there. I've been lucky in life, over and over, and I try to stay very aware of it.

Alberto Rosas seated with his identical twin Alejandro
01

The first luck: a twin

The first luck I had was being born with an identical twin, Alejandro. If you have one you know: it makes life way, way easier. You always have a co-founder, a training partner, a rival and a best friend in the same person. Everything I've built, I've built with him.

Alberto and Alejandro Rosas together on a boat
WITH MY TWIN
02

Tennis

The second luck was a good education, four languages, and tennis from very young. Tennis taught me discipline, competitiveness, confidence, and the most important lesson I know: results come from long hours of hard work without seeing anything back for a long time. I was always among the top players in Spain for my age, traveled playing tournaments at a high level, and at 14 I played the world championship.

Tennis and I have a love-hate relationship. At 15 I stopped completely.

TENNIS
03

The party years

What came next was a heavy change: I dedicated myself full time to partying and understanding the world. My twin and I were going out twice a week in Barcelona, worked as nightclub promoters (we were some of the best in the city, even though we couldn't legally enter some of the clubs we promoted), and worked as bartenders. It sounds like wasted time. It wasn't. I learned how people think, how incentives actually work, how to sell, how to read a room. One day I'll write the full stories here. (I still love to party hard — but now it's 3-4 times a year, and I make them count. Lately it's been very fun and mostly techno, though I like all types of music.)

Alberto Rosas celebrating with friends at a nightclub
3-4 TIMES A YEAR · MAKE THEM COUNT
04

Getting my shit together

At 18 I went back to tennis with a scholarship in the US, and finally learned some English (Spain is very bad for learning English). After six months I came back to Barcelona and decided to get serious. Then something unexpected happened: I fell in love with studying. It's incredible that you can trick your brain so dopamine hits when you learn hard things.

I got into electrical engineering and opened books for the first time in my life. I finished with the best grades across all the engineering degrees at my university and got a prize for it. In the middle of it I was already self-learning AI and started working as a researcher at the university, doing research on Parkinson's dyskinesia detection with deep learning. I wanted to go deeper into foundations, so I started a master's in applied mathematics, and I loved it.

Alberto Rosas working at a desk with Alejandro in the background
04—05LEARN / BUILD / REPEATBCN → SF
05

Leaving the rat race

At some point I realized I was playing the rat race. If I really wanted to create positive impact at scale, I had to build my own things. So my brother and I started our founder journey with zero knowledge about managing, product, web development, sales or marketing. We made many, many mistakes. Gamium, our first company, grew to 33 employees in the web3 space and eventually failed: no product-market fit, scaled too fast, no leadership skills yet. Expensive education, best education.

Then we had the brilliant idea (sarcasm) of starting two companies at the same time, in completely different fields: Sante, one of the biggest anti-aging businesses in Spain, and Didit, where we spend most of our time today, giving trust back to the internet.

06

Health and anti-aging

I'm obsessed with health and anti-aging. Not casually: obsessed. Training, sleep, bloodwork, protocols. I think staying young and high-energy for a very long time is one of the highest-leverage projects a person can run, and it compounds like everything else I care about. It's also why Sante exists.

07

Adrenaline, and sport as a constant

I'm an adrenaline seeker. I love skydiving: around 100 solo jumps, licensed since 2023, and it's the moment I disconnect the most — just me, the sky, and my friends. Most of my jumps are with friends, and I enjoy that mix of focus and freedom more than almost anything.

Sport has always been the constant. These days I train CrossFit and boxing — dynamic, demanding, fun. I couldn't live without sport: it's where the discipline, the energy and the clear head come from.

I believe fully in regret minimization. When I'm deciding, I ask which choice my 80-year-old self would regret not taking — and then I go all in. I want to live life to the maximum, with no fear.

SKYDIVING · ~100 JUMPS
BOXING
08

Building as art

Building is my way of doing art. Not many people understand that, but the way I do go-to-market, product and tech has a lot of my fingerprints encoded in it, and I find real satisfaction there. I love to code and do product, and what I love most is owning the loop end to end: product, code, distribution, talking to customers, and back to product. I'm a generalist, AI-native, running coding agents, automating, scaling, doubling down on what works. Getting 1% better every day: crazy compounding effects.

I appreciate beauty in all its forms — code, products, bodies, spaces, ideas — and I'm pretty obsessed with it. It's the same obsession everywhere: make the thing right, then make it beautiful.

Over the years I've developed my own style of building companies: vertical integration and efficiency. Own as much of the stack as makes sense, keep the machine lean, and go deep into the details — deep enough to find the critical pain points and solve them at the root instead of patching symptoms. Most of the leverage lives in details nobody wants to look at.

On the technical side I'm full stack in the widest sense: web development, blockchain, AI — I can build mostly anything. But I enjoy the other half just as much: brand and go-to-market strategy, marketing, making things people remember. That's what we're doing with Didit and Sante — building long, durable brands. And I genuinely like operations: doing the hard, unglamorous things nobody wants to do. That's where moats come from.

My journey as a founder just started. There's still a lot to learn, but I'm confident about my learning and execution speed, and I'm sure that together with my twin we'll build generational companies and give back 1000x to the world. That's what you do when you've been this lucky.

09

The push

One of my passions is helping people get better: friends, or random people with that energy in them, disciplined, good persons who want to do great things. I know personally how hard everything is, especially without mentors. I think one of the highest-impact things you can do is give a little push to high-potential people in everything you can. That's also why I angel invest as a hobby in founders I like and who learn fast, with no expected financial gain, around 20 companies so far and growing.

END / BEGIN AGAIN

One more luck I never take for granted: I found an amazing group of friends who share the same values. We all want a better world, and to be better every day. That's a blessing too.

I try to bring positivity into the world and keep the energy high. Life is so good, and we have to be grateful for it, even if we're probably in an ancestor simulation. Let's make life better.