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Guillermo JabaleraGJ

Guillermo Jabalera

Full Stack Developer

€150/day
Almería, ES
3-7 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Guillermo

Do you need a professional website, a custom web application, or to digitize your business? I can help you turn your idea into a functional, selling, and secure digital product.

I am a full-stack developer specializing in cybersecurity. This means that every project I deliver not only works well but is also protected against vulnerabilities from the design stage: SQL injection, XSS, CSRF, secure configuration of APIs and servers.

How I can help you:
→ Design and development of corporate websites and landing pages
→ Online stores and e-commerce (WooCommerce, custom development)
→ Custom web applications: dashboards, CRMs, ERPs, management platforms
→ Development of SaaS and digital products from start to finish
→ Cross-platform mobile applications with React Native
→ Web security audits and application hardening
→ Web maintenance, performance optimization, and technical support
→ Technical consulting and software architecture

Technologies: Laravel, PHP, React, Node.js, Next.js, TypeScript, JavaScript, HTML, CSS, TailwindCSS, PostgreSQL, MongoDB, MySQL, Python, AWS, Docker, Git, WordPress, WooCommerce, Figma.

Common deliverables: turnkey websites, functional MVPs, complete web applications, migrations, redesigns, security audits, and technical reports.

For larger projects, I have a second senior developer, which allows us to shorten deadlines without compromising quality.

Creator of HorasProApp.es, a time tracking SaaS for businesses adapted to the 2026 regulation.

Based in Almería. I work with clients across Spain and Europe remotely.
  • Spanish

    Native or bilingual

  • English

    Conversational

Remote only
Primarily works remotely

Experience

  • HorasProApp
    Co-founder & Developer
    E-COMMERCE
    May 2025 - Today (1 year and 1 month)
    Spain
    • Co-founder and developer of a time tracking SaaS platform for businesses and work teams.
    • Design and development of the complete product architecture, including backend, frontend, and user experience.
    • Implementation of functionalities focused on time management, automation, and internal process optimization.
    • Active participation in product strategy, technical decision-making, and business growth.
    • Focus on creating a scalable, intuitive solution adapted to the real needs of modern businesses.
    Software Development Start-up Amazon Web Services (AWS) Node.js PHP
  • ABADESA EXPORT CENTER SL
    Web Developer
    E-COMMERCE
    May 2025 - Today (1 year and 1 month)
    Spain
    • Development of custom web solutions and digital platforms for different types of clients and businesses.
    • Backend development with PHP, integration of functionalities, and database management.
    • Creation, customization, and maintenance of online stores on Shopify and WordPress/WooCommerce.
    • Implementation of e-commerce solutions focused on performance, usability, and user experience.
    • Optimization, maintenance, and continuous improvement of web applications and e-commerce platforms.
    • Collaboration on projects focused on scalability, responsive design, and digital process improvement.
    Shopify Wordpress SEO audit Google Analytics E-commerce
  • Ireland Website Design
    Web Developer
    March 2023 - June 2023 (3 months)
    Waterford, Ireland
    • PHP Development and maintenance (Backend).
    • Implementation and optimization of interfaces in HTML, CSS, and JavaScript.
    • Web server administration and optimization.
    • MySQL and SQL Server database management.
    • Integration with APIs and external services.
    • Improvement of software performance and security.

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Education

  • Master's Degree
    I.E.S Aguadulce
    2024
    Máster
  • Higher Vocational Training
    I.E.S Jaroso
    2023
    G.S.

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