Alex's start-up, 3DK Tech limited, was established as a result of his PhD research at HKUST, with the resources that he said would have been very difficult to access back home in Romania. While in the University, he and his team developed a novel way of metal 3D printing - the proprietary Ultrasonic metal 3D printing technology, which adds a great deal of efficiency and reliability to Selective Laser Melting (SLM), the leading metal 3D printing process in the market.