I lieber über >Ergebnisse sprechen, als über Techniken. But if you want to know which are my toolsets, ist all about linux, web, ajax, frameworks.

Content Management: Wordpress, Drupal, Moodle or custom

Programming: PHP, Python, Bash, Ruby, Javascript, HTML, CSS

Frameworks: Symphony, Laravel, Angular, Ionic, jQuery and more

Database: any SQL

Linux: Server setup and management.