People
People at xAI (SpaceXSI)
5 people in the USASI People directory whose sourced profiles document a current or earlier role at xAI (SpaceXSI); 1 of them in a current role. Current roles are listed first, then alphabetically. Each profile covers public professional work only. This is not a ranking.
Lauren Tan
Software Engineer
React Compiler core team engineer who helped bring automatic memoization to React, now at xAI and Cursor
Byron Hsu
Previous role listed on GitHub profile (earlier role)
Led Liger Kernel, open-source Triton kernels for memory-efficient LLM training and fine-tuning
Elon Musk
Chief Executive Officer and director; after the March 2025 merger of X and xAI, President, Treasurer and Chief Executive Officer of X.AI Holdings Corp. (earlier role)
Leader of SpaceX and Tesla, bringing reusable rockets, crewed spacecraft, electric cars, and Grok to the world
Xinlei Chen
Member of Technical Staff (earlier role)
Contributes to multimodal work at OpenAI; formerly at xAI and Meta FAIR; first author of SimSiam
Ying Sheng
Member of technical staff who co-led the inference team (2024–2025) (earlier role)
SGLang co-author and codeowner; first author of FlexGen, for running large models on a single GPU
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