Apple is searching for an "iOS Frameworks QA Engineer" who will have the chance at working on "the very first iPhone/iPad app that uses a new API/framework in the next version of iOS," notes AppleInsider. The person will have to cooperate with different engineering teams to ensure the quality of APIs and frameworks. The job listing -- quoted above -- doesn't specify what a next-generation API might contain, but offers a first hint at Apple's development of iOS 7.
