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

Senior AI Software Engineer

I scale pre-training and post-training infrastructure at Zoom for speech, multi-modal, and agentic LLMs, with a focus on high-performance computing and communication frameworks, including PyTorch, CUDA, and NCCL, etc. 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