English editor office assitant

Monday to Friday part-time, 10-13 pm working from my home in the center of Madrid, and/or from yours.  
I own a small communications agency and need help with editing, invoicing, letter writing, and booking meetings over the phone.  Fluent, Native English is a must!  Spanish bi-lingual is also very valued.  No papers are required.  Salary is 800 Euros a month with one month of paid holidays.  Must have experience in writing or editing in English. Please send a link with examples of previous work.  CV and letter of motivation. References as well will be checked. Candidates will not be considered without previous writing examples or a very extensive knowledge of English and writing. Thank you.