 After receiving his MBA, Martínez went to work for Citigroup, taking a position on the emerging-markets desk in New York.At Citigroup he began to work “with distressed debt in far-flung places.” In 1985, he left Citigroup.When he turned 30 in 1987, Martínez started Fintech, reportedly with the help of a US$300,000 loan from his grandmother, which he was able to repay with interest within a year.