A scalable architecture is provided for decentralized scaling of resources in a media content encoding platform. The scalable architecture is comprised of a first slicing tier, a second broker tier, and a third encoding tier. Each tier can be horizontally and vertically scaled independent of one another. The second broker tier receives media content slices from the first slicing tier. The second broker tier retains the slices directly in main memory of different brokers without writing the slices to a database or disk. The brokers distribute the slices from main memory across the third encoding tier for encoding based on availability of different encoders in the third tier. This architecture improves overall encoding performance as some of the delays associated with managing and distributing the slices at the second tier are eliminated by operation of the brokers.