09/26/2026 updated

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Senior Full Stack / Frontend / AI LLM & RAG Engineer

Alcala de Guadaíra, Spain
Worldwide
Bachelor degree in Computer Engineering
Alcala de Guadaíra, Spain
Worldwide
Bachelor degree in Computer Engineering

Profile attachments

Portfolio.pdf
Jose-Luis-Medina-Burgos-cv-AI-Engineer.pdf
Jose-Luis-Medina-Burgos-cv-Senior-Fullstack.pdf
Jose-Luis-Medina-Burgos-cv-Senior-Frontend.pdf

About me

Senior Fullstack Engineer & Developer (Vue/React/Next.js/TS/Python/Node.js) | Architecture & Accessibility Specialist (WCAG) | AI-Augmented (Cursor) | Freelance. Available for freelance/contract roles across Europe.

RAGLLMGeminiJavaScriptPHPUser Experience (UX)Web AccessibilityNode.jsScrum MethodologyNext.jsTypeScriptWeb Accessibility InitiativeWeb Content Accessibility GuidelinesWorkflowsReact.jsBackendTwigAngularJSFull Stack DevelopmentContaoFront End Software Development
Frontend Development
Expertise in Vue.js, TypeScript, Angular.js, JavaScript, HTML5, CSS3, and modern frontend frameworks with extensive experience in component-based architecture and responsive design

Backend Development
Proficiency in ASP.NET, Node.js, PHP, Ruby on Rails, and RESTful API development with strong database engineering and server-side programming skills

Web Accessibility and User Experience
Specialized knowledge in WAI-ARIA standards, screen reader compatibility, and creating barrier-free applications for users with disabilities

Testing and Quality Assurance
Experience with Jasmine, Karma, Cypress for JavaScript unit testing and automated testing frameworks

Content Management Systems
Development and integration experience with Contao CMS and custom content management solutions

Template Engines
Knowledge of templating systems including Razor Templates, Handlebars, Haml, and Twig

Version Control and Development Tools
Proficient with Git, Subversion controlling systems, and modern development workflows

Operating Systems
Comfortable working with Unix-Like systems as well as Windows OS environments

Project Management Methodologies
Experience with SCRUM and Waterfall methodologies for agile project development

Experience

Professional experience10+ years
Freelancer since2016

Languages

GermanFluentEnglishFluentSpanishNative speaker

Project history

Senior Full-Stack / AI Engineer

MiPlan.es

Banking & Financial Services

Freelance Senior Fullstack Engineer

addmore GmbH

Telecommunications

Improved accessibility (WCAG) of Vue.js 2 and 3 components to ensure screen reader compatibility and usability for users with disabilities. Contributed to the migration from Vue.js 2 to Vue.js 3, modernizing and optimizing the frontend codebase. Participated in CMS development and integration tasks using Contao.

Freelance Senior Frontend Engineer

kuehlhaus AG

Internet & IT

Responsible for setup, development and support of main projects. Responsible for the technical concept and solution as lead frontend developer. Implementation of a white label solution based on TypeScript and Webpack for extensive use in new projects.

Freelance Senior Frontend Developer

Pop Rocket
Implementation of new features using Vue.js and Storybook. Extensive use of Css Animations and Scrollmagic modules.

Freelance Senior Frontend Developer

IBM iX

Internet & IT

AngularJs 8 and Redux Store based app. Augmented reality implemented with 8th Wall based on A-Frame VR.

Freelance Senior Frontend Developer

Interactive Tools
Support and development of the php5 based corporate website focusing on frontend side (Twig + Javascript components). Implementation Insights Facet Filter in ReactJs and Redux. Barrier free development and optimization.

Freelance Senior Frontend Developer

IBM iX
Barrier free and user-friendly GUI development with Veams.js. Screen reader and high contrast mode implementation. Active engagement on the development of Javascript modules for Veams.js framework.

Freelance Senior Frontend Engineer

Strato AG
Responsible for frontend software engineering, development and maintenance of HiDrive and MagentaCloud Web Applications. Implementation of user-friendly GUI development using Backbone.js and Require.js. Development of project structure and setups using Node.js and NPM package manager. Javascript Module unit tests with Jasmine.

JavaScript Developer

Aperto GmbH - An IBM Company
Participated in the development of the company's frontend framework and development of big projects such as IHK Berlin, Bundeswehr oder Universität Basel websites. Implementation of user-friendly GUI making use of Ampersand.js (Backbone.js based) and Browserify.js and Sass. jQuery Widget based website development enriched with media and interactive elements i.e.,Google Maps and HTML5 Video/Audio Player.

Junior Frontend Developer

zweimaleins GmbH
Software engineering and development of product configurator web app using JavaScript, jQuery and Ruby on Rails (Deutsche Telekom). Part of the development team of a Powerpoint-To-3DApp converter using Backbone.js, Node.js (WebSockets) and Ruby on Rails. Development and maintenance of the company intranet Ajax combined with Ruby on Rails RESTful Api.

Frontend Developer

Moviepilot
Support and maintenance of the company's website with HTML5, CSS3, JavaScript, jQuery, jQueryUI, Backbone and Ruby on Rails. GUI implementation with D3.js and Ajax technology.

Frontend Developer Intern

Bookletmobile
Front End Development with HTML5, CSS3 and JavaScript. Development of Selenium Tests using Java framework.

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