If you're wanting to find a job working for the mountain company in their restaurants, ski/snowboard school, on the mountain, or as part of any of their activities, then they have now got a special workers website where you can submit your CV. It's only in Catalan, Spanish & French, but here's the link:
apps.grandvalira.com/rrhh/site/index.asp
apps.grandvalira.com/rrhh/site/index.asp