Arthur Qian focused on build system reliability and compiler infrastructure across several LLVM-based repositories. In Xilinx/llvm-project, he restored GPU-to-NVVM transformation capability by resolving a missing MLIRNVGPUDialect dependency in CMake, stabilizing the MLIR GPU toolchain. For Xilinx/llvm-aie, Arthur improved build concurrency by introducing a file locking mechanism in CMake, preventing race conditions during native builds, and refined linker behavior by suppressing false MLIR triple mismatch warnings. In llvm/clangir, he addressed cross-compilation issues for the mlir-irdl-to-cpp tool by correcting CMake dependency wiring. His work demonstrated depth in C++, CMake, and system programming for robust build and integration workflows.