Arelance is a recruiter for the IT business. Most job offers are published on behalf of client companies.
In terms of recruitment areas, Arelance is primarily hiring new employees in the categories Software Development, Web Development, and Databases. They recruit for offices in Madrid, Málaga, Barcelona and 8 other locations. See below for a list of 133 job offers at Arelance, for example "Operador de consola (Mainframe), Madrid" and "Desarrollador/a Middleware".
Lastly, here's where to find the company's homepage to give you a better idea of their products and services: Arelance's website.