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Javier G.JG

Javier G.

Full Stack Developer | Web | Mobile

€220/day
Madrid, ES
3-7 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Javier

✅ ES
Desarrollador web especializado en diseño y desarrollo con React, creación de aplicaciones multiplataforma y videojuegos para dispositivos móviles con Unity. Combino desarrollo de software con conocimientos en ciberseguridad, para garantizar aplicaciones funcionales y seguras.

✅ EN
Web developer specialized in React, building multiplatform apps and mobile video games with Unity. I combine software development with cybersecurity expertise to deliver applications that are functional and secure.
  • Spanish

    Native or bilingual

  • English

    Fluent

Remote only
Primarily works remotely

Experience

  • Burlington Books
    Programmer and IT Support
    EDUCATION AND E-LEARNING
    September 2024 - September 2025 (1 year)
    Algete, MD, Spain
    • Development and maintenance of corporate web applications with PHP, JavaScript, HTML, CSS, Bootstrap, React, and Python.
    • Optimization of server requests, component updates, and data security enhancements.
    • Development of automated data loading processes with Python.
    • Integration of APIs and structured data for the corporate intranet.
    • Transformation of Figma designs into functional interfaces consistent with the corporate image.
    • Execution of internal cybersecurity audits to detect vulnerabilities and raise staff awareness through training.
    JavaScript PHP Bootstrap Python HTML + CSS
  • Startup en desarrollo
    IOS/Android Application Developer with Unity 3D
    VIDEO GAMES AND ANIMATION
    July 2024 - Today (1 year and 11 months)
    Madrid, Spain
    • Development of video game applications for Android and iOS with Unity 3D and C#.
    • Design, architecture, and integral development of the project for both frontend and backend.
    • Implementation of game logic, interactive mechanics, and optimization for mobile devices.
    • Development of support tools and web interfaces with JavaScript, PHP, Python, HTML, and CSS.
    • Deployment and publication on Google Play Store and Apple App Store, complying with technical and regulatory requirements.
    • Participation in all phases of the software lifecycle: planning, prototyping, development, functional and performance testing, and continuous maintenance.
    Unity 3D C# Python JavaScript HTML + CSS
  • Xtart Formación Profesional
    Frontend Developer
    EDUCATION AND E-LEARNING
    April 2024 - June 2024 (2 months)
    Alcobendas, MD, Spain
    • Design and implementation of responsive web interfaces focused on user experience.
    • Development of dynamic web applications with React.
    • Backend implementation with Laravel, including relational database management, migrations, and data retrieval.
    • Application of agile methodologies (Scrum) for organizing work by sprints and adapting to requirement changes.
    • Execution of functional quality tests and system correct functioning.
    • Collaboration with multidisciplinary teams for incident resolution and improvement implementation.
    React.js JavaScript PHP HTML + CSS Bootstrap

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Education

  • Higher Degree in Cross-Platform Application Development
    Alfonso X El Sabio University
    2024
    Desarrollo de Software

Skill set

Categories