Ali worked extensively on the LadybirdBrowser/ladybird and SerenityOS/serenity repositories, building and optimizing core systems such as the WebAssembly runtime, DNS resolution, and regular expression engines. He applied C++ and CMake to deliver features like tail-call support, SIMD, and memory64 proposals in LibWasm, while also improving performance through stack optimizations and direct threading. His work included enhancing data structures in AK, refining shell completion in SerenityOS, and stabilizing cross-platform builds. By focusing on memory safety, runtime efficiency, and standards compliance, Ali consistently delivered robust, maintainable solutions that improved reliability and developer productivity across complex, evolving codebases.