About MeHi! My name is Julian Serra. I live in Mexico City, Mexico. I started as a software engineer and now I build companies. Right now I am the co-founder of trece, which is building patient-to-agent healthcare for Mexico. Some of my favorite things: - Riding my bike
- Golf (handicap around 9)
- Fútbol. Visca el Barça!
- My German Shepherds
- A good pint of Guinness
My Work- trece (2025 to now) – Co-founder
The future of healthcare is patient to agent, and it needs infrastructure. trece is building both sides of it in Mexico: a patient-to-agent service that turns scattered labs, prescriptions and wearable data into one living record, a plan with biomarker targets, and an agent that answers from your own history; and a world-class, AI-native EHR for the doctors on the other end. All of it connected to 500+ lab locations. - Stanford GSB (2022–24) – MBA
A before and after in my life. - Bitso (2020–22) – Product Manager
Shipped the first version of the stablecoin product that now moves ~10% of US→Mexico remittances. Led the Brazil launch to 500K+ users in six months. - Bitso (2018–20) – Software Engineer
One of the first engineers. Core payments infrastructure, and part of the team behind Mexico's first IFPE license. - Columbia · Claremont McKenna (2018) – BS Computer Science, BA Economics
The Combined Plan: engineering in New York, economics in California.
My Essays- The Hidden Signal: why HRV is the number you're not tracking (Apr 2026) NEW!
- Why I'm building this (Oct 2025)
- From scarcity to abundance: the patient-owned health revolution (Oct 2025)
- The migration of the monarch butterfly: a lesson for us? (May 2024)
- Three lessons on difficult conversations (Apr 2024)
- Constitutional AI: a path towards global value convergence? (Mar 2024)
Cool ToolsI wrote some CGI scripts. Try them!
Cool Links
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