Jonathan Ruiz Peinado

Castellon, 12006, Spain · +44 (0)7754 218 610 ·

I am a software engineer with over 20 years experience creating applications, the infrastructure to support them, automating system administration tasks and migrating infrastructure and workflows to new paradigms and platforms.


Full stack developer


Healthcare Information System (HIS) - The project goal was to develop a HIS to compete against players like HP, with their well established solution HCIS. We joined the ongoing project as specialists when they already had some instances in production, our mission was to help the team and improve their chances of reaching the deadlines.

Feb 2020 - Aug 2020

Lead C++ developer


The client needed to update their ITS in order to be able to fulfill the market demands. The main goal at this stage was to re-factorize the system core built on C++ for windows only and make it work also on Linux by using cross platform libraries like Boost.

Jun 2019 - Jan 2020

Lead react native developer

Bitheater Ltd

Audio recording Mobile App - Startup which objective was to develop an interesting mobile base service. In order to reduce development cost while keeping the possibility to publish in both main mobile platforms, react native was chosen to build this app. We had to start with react native from scratch, but we could start building components the very first day due to the abundance of documentation and on-line support.

Apr 2019 - May 2019

Lead Angular developer

Bitheater Ltd

OCR scanning Mobile App - The client approached us requesting budget for an app to scan, store and manage data from businesses cards. In order to prove the speed and validity of our tech stack for this particular project, we developed the application without any payment in advance nor compromise. The cost of development and maintenance is now considerably lower mainly due to having a unique version of the code for both major platforms, Android and iOS.

Mar 2019 - Apr 2019

Lead full stack developer

Bitheater Ltd

Progressive Web App development - Our client’s app was banned from App Store and needed an alternative way to publish it, using responsive HTML and the mobile browser version was not enough because we needed to access the mobile bluetooth stack, and not all browsers had implemented the API to do so. Our proposal to keep native app like appearance and functionality in iOS, was to use a combination of PWA and to build a secondary native app which goal was to play PWAs that needed bluetooth API access.

Aug 2018 - Mar 2019


University Jaume I of Castellon

Bachelor of Science
Computer Science Bsc - Track Average Qualifications: 78
Sep 2009 - Jun 2012


Programming Languages & Tools

Awards & Certifications

  • 1st Place - University UJI of Castellon - Sumobot 2008
  • 2nd Place - University UJI of Castellon - Web application development 2007
  • WAI0.1x: Introduction to Web Accessibility -