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Miguel Carranza

Reflections on computers & humans

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The Dopamine Problem Every New Manager Face

I recently wrote an internal Management 101 guide for new RevenueCat managers. It is not meant to be a universal management guide. Most universal management advice is either too vague to be useful or too generic to survive contact with a real company. My goal was simpler: explain what we expect from managers, why the role matters, what tends to feel weird at first, and where to start when things…

AI shouldn't shrink headcount. It should shrink teams

Another thought leadership post about why teams should be smaller. I know, very original. But there’s a version of this conversation that’s actually useful, because the point is easy to misunderstand. When we talk about smaller teams at RevenueCat, the goal isn’t to stop hiring or to pretend AI means we need fewer people. If anything, it’s the opposite. We want to do more with the people we have,…

100 Lessons From Building a 100-Person Org

RevenueCat now has more than 150 team members. Around 100 of them are in my org. This is still a little crazy to me. My own org is now bigger than any company I had worked at before starting RevenueCat. As a technical founder, I always preferred computers over people. Computers are deterministic. People are emotional. But if you find real PMF, team building becomes unavoidable. You have to build…

My role as a founder CTO: Year Eight

2025. What a year it has been. If a normal year as a startup founder already feels like four or five regular years, this one felt closer to a full decade. The pace of change in our industry has been wild. The concept of vibe coding is not even a year old. Apple was forced, for the first time, to allow external payment links in the US. Apps became easier to build than ever. Kids now want to become…

The Long Run

They say only one out of 1000–2000 startups becomes a unicorn, and that only 1% of humans will ever finish a marathon. If you had asked my mother, though, she would have told you it was a thousand times more likely I’d build a billion-dollar tech company than finish a marathon. And I would’ve agreed. I was that kid in school with straight As who still almost failed PE. Two laps around the soccer…

My role as a founder CTO: Year Seven

2024 has come and gone, and it’s time for my annual post. What a year for startups—like squeezing five regular years into one. Do you remember the Apple Vision Pro, the DMA regulation, founder mode , or the o1 launch? All of that happened in just the last twelve months. It’s also been wild at RevenueCat. My journal is full of stories that could fill a whole book or even a few HBO Silicon Valley…

Full Circle

I’m back in Spain for my brother’s wedding. I rarely visit during the summer. The heat in my hometown is brutal, around 40 degrees Celsius (over 100 Fahrenheit for my imperial friends). Most people escape to the coast, just like my family did when I was a kid. I haven’t been here in years. As I drive along the coast, I find myself reflecting on a tweet about money and happiness , a vivid memory…

From J1 visa to Blue Passport: A startup founder's immigration journey

I am drafting this post at 35,000 feet flying back from Japan. I’ve entered the US about 30 times, but this will be the first time I’ll be using my shiny blue passport. No anxiety about aggressive questions, secondary inspection, or the possibility of deportation. A couple of days ago, my wife had her naturalization ceremony, and with her, our whole family is now American. This is a reflection on…

Working with Miguel: A Practical Guide

Since reading ‘High Growth Handbook’ by Elad Gil , the value of writing a ‘Working with’ document became crystal clear to me. I am sharing mine externally to inspire other founders and leaders to reflect and write down their own working styles. These documents are incredibly beneficial, especially in a multi-timezone, remote setting like we have at RevenueCat. I’ve spent some time fine-tuning…

My role as a founder CTO: Year Six

Another year as a founder CTO, and let me tell you, it’s been one for the books. I can’t remember a time in my life that was more demanding and emotionally draining . Those early years were filled with hard work, but we were also full of energy, ambition to build, and the sense that we had absolutely nothing to lose. As my dear friend Jacob used to quip, “Worst case scenario nobody dies” . Yet,…