"He and three partners “went into a zero-salary moment” setting up Algomi Ltd., a bond sales management platform to be used by traders, portfolio managers and investors. Three years later, the 42-year-old says the far longer hours to bring home a fraction of his previous pay are worth it. “I enjoy what I’m doing, we’re creating something I think is making a difference, and it’s mine.” "

It doesn't seem like he really left finance at all - in fact, it looks like he probably hired some coders and had them build a product that he oversaw, then sold it utilizing his experience and connections inside the financial industry.

Are you really leaving finance for a tech job if all of your clients are in finance?

Also, did he really risk his life savings on this? Seven figures for even just a few years would set you up to launch a company and still retain some life savings, it seems like.