Senior Software Engineer - Cards

As the story goes, in 1949 Frank McNamara finished dinner at a New York restaurant and found he'd left his wallet in another suit.

His fix was a card that let members eat now and pay later.

That card became Diners Club, widely credited as the first multipurpose charge card.

It was a piece of cardboard and a promise: the restaurant trusted the card, the card trusted the member, and someone had to make sure the money actually moved.

More than seventy-five years later, the promise hasn't changed, …