Explore the power of Backstage, an open-source solution by Spotify, for building internal and external application development platforms in this DevConf.CZ 2023 conference talk. Discover how Backstage addresses the challenges of creating enterprise-level developer portals without compromising autonomy. Learn about its key features, including a unified software catalog, software templates, documentation hub, integrations hub, search platform, and custom plugins. Understand how Backstage empowers developers to ship high-quality code while providing a holistic view of an organization's development ecosystem. Gain insights into how this platform aligns developers with both value creation and process adherence, ultimately enhancing the entire application lifecycle.