Ben Tellings, often dubbed the "inventor" of German online banking, transformed ING Diba as its CEO from 2003 to 2010. Under his leadership, the bank's clientele grew from 1 million to an impressive 7 million. He pioneered a streamlined product offering, challenging traditional banking giants. Even after his CEO tenure, he shaped ING Diba's path as the supervisory board's head. Now 66, while enjoying retirement, Tellings' fervor for the industry shines through his fintech investments, like Berlin's "Bling."