Autonomo teacher needed - very central location

We are looking for a talented English teacher to teach two general English courses in the center of Madrid. The courses start on 8th January. 

Courses:
A2 Level: From 17:30 to 19:00 on Tuesdays and Thursdays
English for waiters (B1- level): From 18:30 to 20:00 on Wednesdays.

Qualifications: 
Native English speaker
Cambridge CELTA, or other teaching qualification.
Training or experience working as English teacher as L2.

Conditions of employment:
18€ per hour
This is a part-time job paid on a per-hour basis. 
The teacher needs to be registered as self-employed "Autónomo".