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, Financial Data Analysis, and Data Analysis. They recruit for offices in Madrid, Barcelona, Málaga and 8 other locations. See below for a list of 143 job offers at Arelance, for example "Técnico de redes routing & Switching, Madrid" and "Analistas Programadores/as Java/j2ee".
Lastly, here's where to find the company's homepage to give you a better idea of their products and services: Arelance's website.