During this presentation, I will intend to delve into the evolutionary journey of the Alya code's development. Originating within the CASE department during the inception of BSC, Alya has undergone significant enhancements since 2005. With a repertoire comprising 16 distinct physical modules tailored to solve various coupled physics, its capabilities have expanded exponentially over the years.My primary emphasis will be on elucidating the array of optimizations undertaken throughout this period, shedding light on the rationale behind specific decisions. Additionally, I will delve into our Continuous Integration/Continuous Deployment (CI/CD) practices, delve into benchmarking methodologies, and explore our strategies for performance monitoring.