Han (Raphael) Jin
Han (Raphael) Jin
(he/him)

Senior AI Software Engineer

I research and optimize the efficiency of pre-training and post-training engines at Zoom for speech, multimodal, and agentic models, focusing on low-level high-performance computing and communication with tools such as PyTorch, CUDA, and NCCL. I hold a Master of Science in Computer Science from the University of Southern California and a Bachelor of Engineering in Computer Science from Huazhong University of Science and Technology.
Skills
MLSys Research
Google Scholar Citations: 200+
Tech-stack
PyTorch
CUDA
FSDP2
DeepSpeed
Megatron-LM
NCCL
RoCE
vLLM
Ray