Worked on the TBD54566975/ftl repository to optimize the build process by refactoring stub generation in the Go-based build system. Previously, stub files were generated multiple times within the build loop, leading to redundant operations and potential inconsistencies. The new approach consolidated stub generation into a single stage before the topological sort, ensuring stubs are created only once per build. This change improved build efficiency, reliability, and maintainability by reducing unnecessary work and lowering the risk of inconsistent outputs. The work demonstrated strong skills in build systems, code generation, and refactoring, resulting in faster and more predictable build throughput.