Justin Fargnoli is a compiler engineer at NVIDIA. He is the maintainer of LLVM’s LoopUnroll component and previously served as a maintainer of the NVPTX backend. His upstream work spans loop optimization and GPU code generation, and he regularly contributes to and reviews changes in those areas. In 2024, he co-presented “A Beginner's Guide to SelectionDAG” at the LLVM Developers’ Meeting, a tutorial aimed at helping new contributors navigate LLVM code generation.