If you think the glass ceiling for women in tech is tough in the United States, take a look at the challenges they face in Mexico, Latin America and other developing countries. For many the obstacles may seem insurmountable, but not for Blanca Trevino, the co-founder, president and CEO of Softtek, a Mexican unicorn that is the largest IT vendor in Latin America.

Since founding Softtek in 1982, Trevino has helped build a far-flung global empire that offers application software development, security and other IT solutions to more than 300 corporations in more than 20 countries. And it generates more than $500 million in annual revenue. This she and her partners accomplished without venture capital, by bootstrapping and plowing all profits back into the company to foster growth.