This conference talk explores the impact of AI, Developer Experience (DevEx), and communities on software security through real-world examples from GitHub's own development practices. Join speaker Joseph Katsioloudes for a 43-minute session that provides behind-the-scenes insights into how GitHub enhances various elements of the Secure Software Development Life Cycle (SSDLC). Gain valuable perspectives on the dynamic interplays between these three transformative forces that are shaping a new era in software development and security. Learn practical strategies for software security, supply chain management, secrets hygiene, automation, and fostering a security culture. Walk away with a deep understanding of industry-leading software practices drawn from experiences of developers helping others with security in a rapidly changing landscape.