This paper looks into the complex interplay of identity (re)construction as conducted by Romanian immigrants to Spain within the context of the enlargement of the European Union towards Eastern Europe. By using qualitative research techniques, the paper attempts to highlight how the migration process, which is closely tied to border dynamics and European expansion occurring in stages from 1990 to the present, has influenced the (re)construction of identity and the change of discourse among immigrants. As part of the analysis, the study looks into the factors that contribute to the initial loss of the components of identity, identity reconstruction, and the types of identity emerging from the process of mobility. Finally, the paper examines to what extent immigrants' temporary work movements influence the nature of identity construction. Copyright © 2014 John Wiley & Sons, Ltd.