Tucked away on a quiet street amid the canals and old buildings of central Amsterdam, the head offices of Adyen reflect its reputation as one of the tech industry's biggest behind-the-scenes companies.
With a valuation of $2.3 billion, and clients including Facebook to Uber, you might be surprised that you haven't heard of Adyen.
"The culture which we have has contributed to our success," Pieter Van der Does, co-founder and chief executive of Adyen tells CNBC.
Van der Does, looking relaxed after returning from a vacation where he's been windsurfing, explains that unlike consumer-facing payment apps like Apple Pay, Adyen works on the back-end and is a business-to-business product.
It's not well known among consumers and Van der Does likes it that way.