I applied through an employee referral. The process took 2 weeks. I interviewed at Paddy Power Betfair (London, England) in Jun 2013
Interview
Really friendly but also very thorough, many tiered process. Firstly a phone interview with different people on different days. Then a Skype interview again with multiple people, both of technical and managerial background and then an in person interview with a written technical test and a thorough chat.