David Newell

David Newell is the Ireland-based Co-founder and CTO of End Close, an AI-powered payments reconciliation platform launched in 2026. Before establishing his current venture, he worked as a product engineer at Intercom and Basecamp, developing technical expertise in business-to-business software and developer tools. He subsequently led the error tracking team at PostHog, where he launched a product that acquired thousands of customers within its first six months. As a second-time founder, Newell previously co-created Unflow, a Y Combinator-backed mobile application content management system that facilitated over $100,000 in creator earnings during the pandemic. At End Close, he partners with former Modern Treasury engineer Sean Bolton to build automated systems that investigate and resolve financial exceptions for high-volume payment processors. His career centers on engineering scalable infrastructure at the intersection of developer platforms and modern financial technology.