Aaron Teo
IBM technology engineer and code owner for llama.cpp's zDNN backend for IBM Z and LinuxONE
- Technology Engineer, IBM Client Engineering, IBM1
- Code owner for the zDNN backend; member of the CI team, llama.cpp project2
Aaron Teo is a Technology Engineer in IBM Client Engineering whose GitHub profile lists AI on IBM Z, inference engines, and IBM Z and LinuxONE as areas of work. llama.cpp's CODEOWNERS file lists Teo, as the ggml-zdnn team, among the owners of the zDNN backend, which enables llama.cpp on IBM z17 and later systems through IBM's zDNN acceleration library, and as a member of the CI team. Teo last updated the project's build guide for IBM Z and LinuxONE in September 2026, and Teo's commits add s390x CPU optimizations, zDNN operations and CI coverage. Teo also publishes a Hugging Face collection of big-endian GGUF models, including IBM Granite models, verified to run on IBM z15 and later systems.123457
Work
llama.cpp support for IBM Z and LinuxONEOpen-source code
CODEOWNERS lists Teo as the ggml-org/ggml-zdnn team, which co-owns ggml/src/ggml-zdnn, and in ggml-org/ci. The s390x build guide credits Teo with its September 2026 update. Commits authored from July to October 2026 add Q8_0 matrix multiplication and memory fixes to the zDNN backend, s390x vector and repack optimizations, CI coverage, and Granite parameter-count fixes. The repository is MIT-licensed.2456
s390x Verified Models (Hugging Face collection) (external site: huggingface.co)Open weights
A collection owned by Teo's Hugging Face account of big-endian GGUF models, including IBM Granite and Qwen2.5 models, whose tokenizers were verified to run on IBM z15 and later systems; the s390x build guide points to it for pre-converted models.74
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