24 year old spanish girl working in Lisbon

Hi! My name is Carlota, I'm 24 and I come from Spain. I moved to Lisbon on October 2017 to work in a multinational company. In July I need to leave my current accomodation, and I'm looking for a room to rent in the city center of Lisbon. I would like to share an apartment with more young people, either students or workers. I'm tidy and responsible, and I will only be at home in the mornings (I work until 1:00 in the night). My favourites areas are Saldanha or Marques de Pombal, but I'm open to more suggestions! I speak Spanish and English.