do you mean as a physician inside an hospital or outside?
Anyway, it's very difficult. For public hospitals you have to make an exam with lot of people for a few places, I don't know about private hospitals.
I studied Physics and me and almost of my friends are working as IT.
The few people I know that can go on investigating is after a long process inside university, working a lot and having low money and with a big insecurity in future or what will happen next year, because they don't have a working contract, it's a kind of scholarship that must be renoved every year. The situation of Science in Spain has never been brilliant but now is even worse.
There is a Colegio de F�sicos, it's a kind of organization that try to help Physicians after you graduate, if you want to have a look, it doesn't look very useful,
http://www.cofis.es/ What you will always be able to do is to teach to students who aren't good at high school with Physics, they're a lot, but I don't think it's what you mean when you talk about working as a Physician.
Maybe there are also some private companies were you could try to find a job, I know a few people who work as physicians, one in a nuclear firm, other in the CSIC(public),...
