4 Acertijos was born in Silicon Valley, California, when two friends and business partners -Jose Valladares and Allan Chao- decided to create a pioneer company in Guatemala. To achieve this, they created a challenge of four riddles that gave people a phone number as a solution, so they could call to apply to a job interview. This is how the company measured potential talent in Guatemala, and, they were able to find the people who ﬁlled the required standard for the company. The experiment worked. And now 4 Acertijos is in Guatemala creating the best applications for the world.