If you have a job offer, please use the social links on this page to contact me on your preferred communication method and request my resume.
My name is León Castillejos. I’m a Higher Technician in Multi-Platform Applications Development. Currently studying Computer Science & Engineering at URJC, a Spanish university located in Madrid.
I consider myself a passionate and creative individual who thrives in highly competitive and intellectually demanding environments.
My native country is Spain, so my primary language is Spanish. I can also speak and write (British) English fluently, and I’m currently learning Norwegian (Bokmål Norsk).
I love travelling. I have visited the following countries:
I want to visit these countries:
I created this blog in order to have a centralised place to express my opinion and share what I know with the world.
Me across the web
- myNoise Friends - Listed as “white hat hacker”, I help secure the website and perform penetration testing and responsible vulnerability disclosure.
- Tutorio.es - Listed as “sysadmin”, responsible for server maintenance, management, and hardening.
How I do my computing
I own a MacBook Pro 2016, and use macOS on a daily basis. I also use Linux very often, and maintain some Linux servers running Debian, Proxmox, CentOS, Fedora Server, and a Windows Server as an experimentation platform.
For editing code, I use Visual Studio Code with a Vim extension. I wrote a post on the extensions I use the most.
My shell of choice is zsh. My settings are published here.
My favourite programming languages are: Python, Rust and Ruby (on Rails).
For writing documents, I use a combination of LaTeX and Markdown, depending on whether what I write will be published on the web (for which I use Markdown, with LaTeX math formulas through MathJax), or needs to be printed, or released as a PDF file, (for which I use plain LaTeX).