Alexis Sirkia wants to fundamentally reshape how digital currencies are traded. As Chairman of Yellow Network, he oversees a start-up developing decentralized clearing systems for cryptocurrency markets, drawing on his deep experience in blockchain technology and financial infrastructure. His path to financial technology was unconventional. He began his career writing software for rocket launches in French Guiana, where he developed mission-critical systems for space operations. His transition to finance came as blockchain technology was first emerging, becoming a key early contributor to the development of Ripple. Now, with Yellow, Alexis is tackling what he sees as the next big challenge for cryptocurrency: creating infrastructure to connect fragmented trading systems.