Explore how commercial and open source software coexist harmoniously in Spotify's Backstage ecosystem in this GOTO Copenhagen 2023 conference talk. Dive into the world of Backstage, Spotify's internal developer platform, and learn about its extensible architecture that supports both open source and commercial plugins. Discover the software catalog, plugin ecosystem, and Spotify-built plugins like RBAC. Gain insights into authorization in Backstage, strategies for success, and valuable lessons learned. Follow along as Joon Park, Engineering Manager at Spotify, shares his expertise on creating a symbiotic relationship between commercial and open source software development.