Can I travel and work for the same employer with another friend?

Yes. A friend, brother / sister or boyfriend / girlfriend can travel together and be employed by the same employer. What can be a problem for couples is that they are accommodated in separate rooms because employers and landlords take great care that girls are with girls and boys with boys in the same room. It is also not certain whether you will get a job in the same position as the person you are travelling with and whether, when you get there, you will have the same work schedule (you may work different days and shifts). This all depends exclusively on the employer and the agreement with him, so you can ask him many things at the interview and solve the dilemma.