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Learn how Cisco's engineering team evolved their massive 4 million line Ruby codebase by decoupling 800,000 lines of code from Rails constructs in this 31-minute conference talk from RailsConf 2025. Discover the architectural strategies and decisions that enabled scaling from a small development team to over 1,000 engineers while maintaining the benefits of Rails framework. Explore the challenges faced with one of the largest Rails codebases in continuous development since 2007, and understand the practical approaches for managing technical debt and complexity at enterprise scale. Gain insights into alternative architectural patterns that can help large Rails applications maintain developer productivity and code maintainability as teams and codebases grow exponentially.
