Not just that, but 10+ different ad and analytics providers, and no fewer than five backend languages (PHP, Node, Java, Ruby, Scala). I'm being sort of unfair, as the BBC is a large, diverse organization that has been around for a long time, and I would be surprised if any one person has to deal with all of the listed technologies. It just happened to be the first of several large and redundant "full stacks" listed on an obnoxious-to-navigate site.
