I applied through an employee referral. The process took 2 days. I interviewed at World Bank Group in Oct 2011
Interview
A friend recommended me for an STC position. They needed somebody ASAP. I've got a phone call the next day from the manager. The manager asked me when I can start and a few other questions and that was it. She gave me an offer right away and I accepted. I had to travel back to my country to get the visa, so I started 2 weeks later. Everything was super fast and easy.
I applied in-person. The process took 5 days. I interviewed at World Bank Group (Washington, DC) in Jan 2008
Interview
I had worked with them before, so knew the people in the interview process. Selection really depends on whether they think you are apt for the job. Emphasis on ability to perform in the time frame they determine.