Private investment firm DST Global has led a US$80 million Series D round for Brazil-based mobile credit card platform Nubank. Existing investors Founders Fund, QED Investors, Sequoia Capital and Tiger Global Management, as well as new investors Redpoint Ventures and Ribbit Capital, also participated in the round. Nubank will use the new capital to invest in data science infrastructure and hire new employees for its engineering, design and data science teams.