 From left: XetHub co-founders Yucheng Low, Ajit Banerjee and Rajat Arya. XetHub Photos A trio of former Apple engineers is leading a new data storage platform for developers building machine learning and artificial intelligence applications. Seattle-based XetHub emerged from stealth mode Monday and announced 7.5 million in seed funding from Madrona Venture Group. The company ... Ex-Apple engineers raise 7.5M for new Seattle data storage... 