Executives from Sydney-based startup Xinja are figuring prominently at this week's Intersekt conference in Melbourne and scored a few headlines on Tuesday when they revealed that international fintech guru Brett King was joining the company as a strategic adviser.Xinja said King was "widely considered the most influential expert on retail banking innovation globally".King, a former adviser to President Barack Obama and the US Federal Reserve, launched the world's first mobile banking service in 2011 when he established the New York-based, Movencorp."I have been working with neobanks around the world for many years, and as an Australian, I'm delighted to finally see this movement reaching home," King said."Xinja shares my view that it is essential we don't just add some new tech to a business model that is 700-years old, but that it is built from the ground up for the digital world."Melbourne-born King will continue in his current role as Movencorp's chairman, while also providing strategic advice to Xinja from New York.