Railway, an engineering company, crossed a significant revenue milestone and built a sustainable business through first principles. They overcame traditional sales challenges by creating a unique revenue function that leverages machine learning to close the information asymmetry gap between developers and their needs. Railway's approach focuses on providing value to customers through product enhancements and support, rather than relying solely on cold outreach or demos. By using data-driven insights to identify customer temperature and tailoring support to individual needs, Railway has improved customer satisfaction and reduced churn. The company aims to continue innovating its sales function, incorporating learnings from its journey into new features and offerings that prioritize speed, trust, and developer experience.