I am Jeanro

Dev Freelance Ruby on rails & teacher.

Jean-Romain KRUPA

My job is to build products and recruit smart people🕵️‍♂️.

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Entrepreneurship 🚀

I am passionate about Startup, products, Saas, engineering, UX / UI... Entrepreneurs are crazy, weird and passionates. Maybe that's why I love them.

I launched 2 companies. The 1st was Vins et Santé in 2015, that I sold in 2017. It is now called dansmabouteille. The 2nd is KP-SKILLS that I launched with the best person on earth... my fiancée Eloïse Pividori.

Web development 💻

I just love ❤️ Ruby on Rails, that I discovered thanks to Le Wagon, I haven't stop coding since.

Education 👨‍🎓

I studied Mechanical Engineering with design and simulation speciality at l'ENISE. During the COVID 19 Crisis I studied finance with Harvard business school online. Then Web development with Le wagon.

Books 📚

I won't do the list of Harry Potter 🧙‍♀️.

lean startup cover

Lean Startup

Amazing if you want to build a company from scratch.

vins et sante 2017

Vins et Santé 2017

Surely one of the best book on the planet 😂

vins et sante 2016

Vins et Santé 2017

Mhhh the author is just incredible. Probably a best seller.



I just love their vision of what should be a company.


Testing with Rspec

Ideal book to learn about Rspec and testing in rails.

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I am not a huge fan of social medias. you can send me an email at: