Hiding messages in recruitment campaigns isn't a new idea - but an idea that still attracts attention. During the second World War Bletchley Park looked for code breakers via messages in newspaper puzzles.
An advert for an engineer at Apple has been found hidden in the tech giant's website. The text begins: "Hey there! You found us", and says the firm is looking for "a talented engineer to develop a critical infrastructure component". It has since been either removed or moved elsewhere. Cyber-security reporter Zack Whittaker discovered it by chance while analysing some data being sent from iPhone apps - but he is not applying for the job. "As part of the stream of traffic I could see, it was connecting to this one URL - and there it was," he said. The page was listed under the web address "us-east-1.blobstore.apple.com" - which now contains an error message. "Blobstore" is the name of a series of servers that belong to Apple.