Twenty is seeking a Distinguished Backend Engineer to work in our Arlington, VA office to architect and lead the development of revolutionary cyber technologies that protect democracies worldwide. We're looking for someone with 12+ years of experience in developing large-scale distributed systems, with mastery-level expertise in Golang, graph databases, and cloud-native technologies, plus a proven track record of driving technical strategy and leading major architectural initiatives across organizations. In this role, you'll serve as the principal technical authority for our backend systems, defining the technical vision and architecture for systems that process real-time cyber operation data at machine speed, lead cross-functional technical initiatives, mentor senior engineers, and drive innovation in how we apply AI, graph databases, and distributed systems to national security challenges. You'll join a world-class product and engineering team that delivers mission-critical solutions for U.S. national security, working in both cloud and on-premises environments to build systems that operate at the cutting edge of cyber warfare capabilities. If you're passionate about solving the most complex technical challenges while shaping engineering culture and making a direct impact on national security, we want to talk to you.