How being cocky secured this start-up a crucial investment

CNBC's Arjun Kharpal sat down with Sebastian Siemiatkowski, the chief executive and co-founder of Klarna, to discuss how the Swedish company plans on replacing the world's credit cards.

Speaking at Slush, a two-day international start-up and investor event in Helsinki, the CEO of the e-commerce firm discussed Klarna's strategies going forward.

During the fireside chat, Siemiatkowski weighed in on how Klarna competes against top tech rivals such as Paypal and Visa, and its plans on shaking up the global payment space and consumer trends in the future.

To hear what Klarna's boss had to say on these matters, watch the event hosted by CNBC at Slush.

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