Introduction

I am Juan F. Capristán W., Fullstack Developer specialized in web development, in systems administration, and in blockchain technology. I like working in projects focused in creating a better society.

I like to program using Ruby, Rails, Sinatra, Golang and Gin, though I also develop using nodejs for work necessity ;). I am co-founder of CreativeCocos.com, and author of Bitcoin Boom!.

If you want to contact me, the easiest way is writing me an email to juan@el placer de compartircreativecocos.la alegría de vivircom, or following me at twitter.

Quick Look

• Juan Fernando Capristán Wadsworth
• I am a Blockchain Architect
• I am a Distributed Applications (Dapps) Developer
• I am a Fullstack web developer
• I wrote "Bitcoin Boom!" book, available in Bubok, Kobo and Amazon (only in spanish)
• I am a Ruby on Rails fan, and also a Golang enthusiast
• I speak spanish and english
• I live in Madrid
• juan@la alegría de vivircreativecocos.el placer de compartircom
• @jfcapristan
• My Linkedin profile
• My blog (in spanish)
• CreativeCocos

Studies

• Computer Science at U.C.M.
• English in P.U.C.P.

• Ethereum Devcon 2022
• Practical Bootcamp in Blockchain Technologies. Devacademy. 2018
• OpenExpo Europe 2017
• Ethereum Dapps Development with Solidity. KSchool. 2017
• Introduction Course to Blockchain Technology. KSchool. 2017
• BARUCO 2013. Barcelona Ruby Conference, Septiembre 2013.
• BARUCO 2012. Barcelona Ruby Conference, Septiembre 2012.
• "Internet Congress 2010". Madrid, October 2010.
• "IInd Webmasters Congress". Madrid, November 2008.
• "Internet Forum 2008". Madrid, May 2008.
• "IInd Congress of editors of periodical publications". Benidorm, March 2006.
• "Ist Congress of editors of periodical publications". Salamanca, February 2005.
• "Interñet : The future of spanish in the internet". Summer Courses in El Escorial, UCM. August 2003.
• "Electronic business, present and future". Summer Courses in UNED. July 2003.

Languages

• Spanish. Mother tongue
• English. Spoken, read and written
• German. Learning in progress...
• Esperanto. Learning in progress...

Programming Languages and Frameworks

• Golang
• Gin Framework
• Ruby + Rails
• Ruby + Sinatra
• nodejs
• python
• haskell
• PHP + Yii
• React JS
• Angular 1.5
• jQuery
• Bootstrap
• LESS, SASS
• HAML, HTML5, HTML4, XML, XSLT, CSS3, CSS2
• JavaScript
• VBScript
• ASP.NET
• Classic ASP

Databases

• CouchDB
• MySQL Client and server administration.
• SQLite
• PostgreSQL
• MariaDB

The Internet

• Web applicaion development based on Gin / Golang.
• Web application development based on Sinatra.
• Web application development based on Ruby on Rails.
• Web application development based on PHP + Yii Framework.
• Web application development based on classic ASP.
• Skilled in HTML, CSS and Javascript, jQuery, ajax, bootstrap.
• Frontend development based on AngularJS.
• Website and blog development based in Jekyll.
• Installation and support on Wordpress, Joomla and other popular freeware CMSs systems.
• Installation and support on Prestashop for online stores.
• Installation and support for OpenX and Revival ad servers.
• Installation and support on Wiki systems like DokuWiki or MediaWiki.
• Secure payment interfaces of several spanish banks.
• PayPal and Stripe payment systems integration.
• nginx web server administration.
• Apache web server administration.
• IIS web server administration.

Blockchain

I have experience developing and administering public as well as private blockchain networks, as Ethereum or Fabric

• Ethereum + Solidity
• Hyperleger Fabric + Go
• Hyperleger Fabric + nodejs
• Hyperledger Besu
• Quorum

Cloud

• Docker
• Kubernetes
• Openshift
• Amazon Web Services (AWS)
• Azure Cloud
• Heroku (Rails Apps)

Organization

• Confluence
• Todoist/Wedoist
• Basecamp
• Eventum
• Mantis
• Bugzilla

• Git (Github, Gitlab, Bitbucket)
• Git Flow
• Mercurial

Experience

• Currently I'm working on Santader Bank's Blockchain CoE, in Madrid, as a Blockchain Architect
• I worked for Inetum Spain (ex Gfi) as Blockchain Consultant from 2018 to 2021.
• I am co-founder of web develpment company CreativeCocos.com and also of its social branch SocialCocos.
• I have developed project Tunaturopataonline, an online platform for a naturopathy cabinet.
• I have developed project Pildorea, an online education platform based on videos.
• I have developed DíayHora, an online reservation system aimed for both professionals and end users.
• I have developed EditMaker project for Cibeles.net, where I worked until december 2012. EditMaker is a web based CMS (Content Management System) aimed to newspapers or periodic publications in the internet. This product is being used by more than a hundred online publications.
• I have developed "CruciSolutions" project, which is a web based crosswords management system that can generate different kinds of similar games of this kind (with inner numbers, outer numbers, blank crosswords and also sudokus), for Puzzlecross S.L.
• I have developed a campaign generator for online signing for Veterinarios Sin Fronteras.
• I have developed project "en.via" (word game that means 'send' and also 'on the way'), which is an application to manage courier companies. This product is being used by EuroVip Service.
• Between 2004 and 2005 I have actively taken part on development of nofumadores.org (nonsmokers) organization website.
• I worked as a teacher in Maths informática academy, specialized in computer science carreer, teaching "Data Structures", "Introduction to Pascal Programming" and "Programming in C and C++" subjects. I taught for this academy between september 2000 and february 2002.
• Several minor freelance projects.

• Co-administrator of the Asamblea del Pueblo de Alpedrete Blog during more than 4 years (between 2011 and 2015)
• Designer of latin american newspaper Quipu during 8 months (between 1998 and 1999)
• Designer of legal magazine DINATOS between january 2000 and may 2001.

Other Info

• I have 22 years of professional experience
• I am 48 years old, was born in Perú, and I've been living in Spain for 30 years.
• I am father of 2 children since 2012, and I love it.
• I like writing, reading, sports, and traveling.
• I am a self-tought piano player apprentice thanks to first lockdown in march 2020.
• I despice animal mistreat in any of its several forms. Specially those socially accepted.
• I was an active member of 15M movement (aka "occupy movement" in Spain) since its very begining in 2011, during 5 years. I think a good path to build a better society is partaking democracy, as the next logical step to the current representative model.
• I am interested in nature, sustainability, healthy life and alternative therapies.
• I don't like to be a passive smoker. Fortunately in Spain this is not a problem anymore (it took hard to get there).
• I believe in God, but absolutely not in religions.