C ristina Junqueira is a Brazilian self-made billionaire and a co-founder of Nubank, the largest and most disruptive digital bank in Latin America. With a background in engineering and business consulting, and after working at a traditional Brazilian bank, she teamed up with David Vélez and Edward Wible in 2013 to create a new kind of financial institution, free from the high fees and bureaucracy of incumbent banks.

As a co-founder and a key executive, Junqueira was instrumental in building Nubank's brand and customer-centric culture. The company started with a single product, a no-fee credit card managed entirely through a mobile app, and rapidly grew by attracting millions of Brazilians who were frustrated with the traditional banking system. Nubank has since expanded its product offerings to include bank accounts, loans, and investment services, and has grown its presence across Latin America. The company's massive IPO on the New York Stock Exchange in 2021 made Junqueira one of the few self-made female billionaires in the technology sector.