It's pretty easy, apply for a tier-1 visa which is a points based system (the main factors they take into account are education level, age, previous earnings an

It's pretty easy, apply for a tier-1 visa which is a points based system (the main factors they take into account are education level, age, previous earnings and english language ability), if you get enough points and don't have a criminal record you can normally get a visa. Most software developers can easily qualify. Once you have that visa you can work for any UK company (there's a minimum earning requirement but most software development roles pay comfortably more than that). Although if you want to do it, sooner is better than later as the current government is thinking about sticking a quota on the number of Tier-1 visas that are issued in a year.