With a keen sense of technological gadgets, Lucas Ngoo has several years worth of software engineering experience, having worked at RedBeacon, before co-founding Carousell. Amazon for a smartphone, Carousell is a classified mobile app that makes selling something as simple as taking a picture and buy as easy as sending a text message. With over 144 million listings and a valued net worth of USD $500 million, Carousell is constantly reinventing itself, having recently just rolled out its latest upgrade: CarouPay, allowing users to complete transactions without leaving the app.