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¡Hola! Soy Javier Castillo 👋

🚀 Higher Technician in Network Systems & Application Development | SysAdmin & Developer

I felt a bit torn between development and cybersecurity, so I ended up training in both... and it’s the best decision I ever made.


🛠️ Skills

💻 Systems

Linux Windows Server Docker

🚀 Development

Java Python Bash Git

📊 Data & Networking

MySQL PostgreSQL Networking


📈 Professional Experience

🏢 Systems Administrator | Grupo INDRA

  • Administration of Windows/Linux environments and Docker containers.
  • Advanced IT support and preventive hardware/software maintenance.

🏦 Java Developer | Grupo CAJAMAR

  • Application development using OOP and maintenance of critical systems.
  • Task automation through scripting and version control with Git.

🛒 IT Support & Automation | Grupo DIA

  • Secure payment management and local network security.

📂 Featured Projects

Documentation of my local network Docker setup. Container management using docker-compose and Dockerfile with volume persistence.

Automation for workflow optimization. Data extraction and automatic backups to reduce human error.


🎓 Education

  • Network Systems Administration (ASIR) – IES Al-Andalus.
  • Multi-platform Application Development (DAM) – IES Al-Andalus.

🎓 Education

  • Network Systems Administration (ASIR) – IES Al-Andalus.
  • Multi-platform Application Development (DAM) – IES Al-Andalus.
  • Java Programming MOOCUniversity of Helsinki.

⚡ About me...

  • 🔭 Currently focus into Cloud Computing.
  • ⚡ I consider myself (sometimes fortunately, other times to the chagrin of my family and partner 😅) a perfectionist; I love things well-done, otherwise I'd rather not do them at all. My hobbies include hiking, all kinds of sports, and gaming.

📬 Contact

LinkedIn Email