Explore the advanced features and capabilities of the Barebox bootloader in this comprehensive conference talk. Delve into the evolution of bootloaders from bare minimum functionality to modern expectations, focusing on scalability and maintainability. Learn about Barebox's first and second-stage bootloaders, board porting processes, and customization options including environment variables, magic variables, and device parameters. Discover how to implement Hush scripts, utilize the Bootloader Specification, and leverage the Bootchooser and barebox-state features for enhanced booting processes. Gain insights into driver development, custom command creation, and recent advancements in Barebox over the past two years. Ideal for embedded systems developers and engineers looking to optimize their bootloader implementations.