Yusuf Suleiman developed robust debugging and testing infrastructure across facebook/buck2-prelude and pytorch/pytorch. In buck2-prelude, he enabled seamless source-to-binary mapping by integrating a Python debug source database into the build and test pipeline, propagating its path via environment variables to improve issue diagnosis and test reliability. For pytorch, he enhanced mobile build testing by integrating Google Test into the fbcode/caffe2 suite, refactoring the test harness for better orchestration and visibility, and optimizing test execution for mobile environments. His work leveraged C++, Python, and build system expertise, delivering maintainable solutions that improved cross-environment consistency and CI reliability.