Well, like anywhere else it always depends on the demand...right now you'd easily be able to get a command position on equipment like the B737/A320 or F100, but those carriers usually don't have seniority lists or are expandeng very fast (eg Easy Jet in the UK, with almost excellent working conditions btw).
Many majors just require around 1000h SIC and are not looking for any PIC time. They will put you to the bottom of the seniority list and it'll take around 10 to 14 years to be promoted to a cpt.
Just two years ago BA hired experienced F/O's and some guys even got a job on the B777.
greetings