You say, "Trabaja por una empresa computadora."
computer in Spanish is ordenador -- la computadora
"Who works here" in Spanish would be "¿Quién trabaja aquí?"
Él trabaja.
informática
computadora
ratón...
ella con trabajo
To say 'I want a computer' in Spanish, you would say 'Yo quiero una computadora.'
Pls note that Compania is for a company as in a business company where compañia is with company as in someone with you.
Hagalo!
You have to say: Usted trabaja?
para mi esta bien