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 Web Development, .NET Framework, and Microsoft APIs. They recruit for offices in Madrid, Málaga, Biscay and 3 other locations. See below for a list of 29 job offers at Arelance, for example "Tester .NET, Madrid" and "Consultor/a Banca Campañas Marketing".
Lastly, here's where to find the company's homepage to give you a better idea of their products and services: Arelance's website.