Hi,
as I can see you are from Denmark so I hope you also understand english :)
I am experienced to work in OOP with usage of frameworks (mainly with Nette, little bit Symfony), the knowledge of CSS/jQuery/html for frontend is matter of course.
I am also experienced in MySQL(MyISAM,InnoDB,...), SQL relations etc.
I worked on some project with usage of API...last one was hotel booking from different providers.
About server administration - I have experience with many server setups and I am also running two own web server both on debian.
Best regards
Peter