Francis Hwang has been writing programs in the Ruby language since back before barely anyone knew what it was. He co-founded the groundbreaking GoRuCo conference in New York City and is currently the CTO of Profitably, a financial analytics startup. Francis builds a scoring system for a fantasy sports league. Out of the six Play by Play courses we've filmed so far, he completed the entire task in the shortest amount of time. Yet he prides himself on using very few workflow or editor shortcuts. It's all about straight-ahead problem solving, clear thinking, and test-driven development.