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Alfonso Medela

Physicist and AI developer, based in Sevilla. I co-founded Legit.Health and led the AI of its CE-marked medical device from 2017 to 2026. Now I build AI for companies.

Alfonso Medela in a dark blazer, in a bright office

From physics to a medical device.

I studied Physics at the University of Groningen and the University of the Basque Country, then Big Data at the University of Deusto.

I started as a BI analyst working for BBVA. Then I was a computer-vision researcher at TECNALIA, a technology centre: plant-disease detection, histology images and projects for industry.

My research is on learning from very few images: few-shot learning, which gets useful models from small labelled datasets.

From 2017 to 2026 I led Legit.Health’s AI: as co-founder and CTO, then as Chief AI Officer, and as Technical Director & PRRC. Its product is a CE-marked medical device, used by more than 2,500 clinicians. Read the case.

Now I’m independent. I build AI for very few companies at a time, and I do the work myself.

Based in
Sevilla, Spain. Remote across Europe.
Languages
English, Spanish and Basque
Education
Physics: Groningen and the Basque Country. Big Data: Deusto.
Before
BI analyst working for BBVA · computer-vision researcher at TECNALIA, a technology centre
Research
29 papers · 847 citations · h-index 10
Legit.Health
2017–2026 · co-founder, CTO, then Chief AI Officer · Technical Director & PRRC

Forbes 30 Under 30Spain 2024 and Europe 2025.

Alfonso Medela at the Forbes 30 Under 30 Europe 2025 list launch photocall, wearing his lister badge
Forbes 30 Under 30 Europe, list launch, 2025. See the Forbes profile

In the press.

Spanish headlines and quotes are translated.

Forbes

April 2025 · 30 Under 30 Europe 2025, Science & Healthcare

“Legit.Health is a platform that uses AI to automatically diagnose and measure the severity of more than 300 skin conditions with smartphone images.”

Forbes España April 2025

“Legit.Health is used by more than 2,500 healthcare professionals in Europe and China.”

These are the Spaniards on the 30 Under 30 Europe 2025 list

Watch on YouTube: TEDxUDeusto: The medicine of the future

TEDx July 2022

“I’m not a doctor, I’m a physicist, but like all of you, I’m also a patient.”

La Razón February 2025

“Alfonso Medela […] designed the vision engine that makes the technology possible.”

Legit.Health: the AI revolutionising dermatological diagnosis

  1. Gaceta UDGOctober 2025Artificial intelligence: a substitute for the doctor or an ally of the future?
  2. Jon HernándezMay 2025Interview on the Inteligencia Artificial channel
  3. Almirall MedFebruary 202510th National Psoriasis Congress
  4. ExpansiónFebruary 2021Legit Health puts artificial intelligence at the service of dermatologists
  5. El CorreoOctober 2020A Biscay startup detects and tracks melanomas using images

Tell me what you want to build.

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