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Ziang Li

PROFILE

Ziang Li

Over four months, contributed to multiple deep learning repositories such as yhyang201/sglang and flashinfer-ai/flashinfer, focusing on backend development and performance optimization. Developed advanced quantization techniques, including per-layer mixed FP8/BF16 serving and MXFP8 pathways, to improve inference speed and reliability. Enhanced CUDA-based matrix operations and integrated FlashInfer for faster linear algebra workloads, while introducing configurable top-k selection and robust weight handling. Addressed precision loss and stability in large-batch processing, and expanded unit testing for quantization and backend flows. Leveraged Python, CUDA, and PyTorch to deliver scalable, production-ready solutions that improved model efficiency, flexibility, and maintainability.

Overall Statistics

Feature vs Bugs

85%Features

Repository Contributions

16Total
Bugs
2
Commits
16
Features
11
Lines of code
6,522
Activity Months4

Work History

May 2026

3 Commits • 1 Features

May 1, 2026

May 2026 monthly summary for yhyang201/sglang: Delivered performance-focused enhancements to the FlashInfer integration and robustness improvements for FP8 quantization. Implemented per-token NVFP4 MoE activation scaling and a configurable DSA top-k backend via a new CLI flag and environment variables to boost flexibility and throughput. Fixed FP8 quantization prefix matching to correctly identify child modules with trailing dots, increasing reliability in mixed-precision workflows. Expanded test coverage for FP8 paths and FlashInfer integration flows to reduce regression risk. These changes deliver measurable business value by enabling faster, more reliable inference and easier experimentation with FlashInfer-backed workloads. Technologies demonstrated include FlashInfer integration, per-token scaling, DSA top-k backend, FP8 quantization, CLI/env configuration, and test automation.

April 2026

9 Commits • 6 Features

Apr 1, 2026

April 2026 monthly summary focusing on key business value and technical achievements across multiple repositories. Highlights include major performance and reliability improvements in matrix operations, MXFP8 quantization, and top-k execution; added configurability for backward precision in Transformer Engine; memory and weight handling optimizations; and stability improvements via testing and compatibility work across backends and frameworks.

March 2026

2 Commits • 2 Features

Mar 1, 2026

Concise monthly summary for 2026-03 focusing on key features, major bugs fixed, impact, and technologies demonstrated. Key business value delivered through robust quantization and optimized inference pathways across two repositories, with concrete commits guiding changes.

February 2026

2 Commits • 2 Features

Feb 1, 2026

February 2026 monthly summary for two sgLang repositories: kvcache-ai/sglang and yhyang201/sglang. Focused on stability, performance, and CUDA graph workflows. Delivered FP32 precision loss mitigation for large-batch weights_proj, a new matrix multiplication kernel, and a CUDA graph-friendly weight binding utility, with accompanying bug fix for nvfp4 weight update.

Activity

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Quality Metrics

Correctness86.2%
Maintainability81.2%
Architecture83.8%
Performance81.2%
AI Usage45.0%

Skills & Technologies

Programming Languages

C++CUDAMarkdownPython

Technical Skills

Algorithm OptimizationAlgorithm optimizationBackend DevelopmentCUDACUDA programmingData StructuresData processingDeep LearningGPU programmingMachine LearningModel OptimizationPyTorchPythonPython DevelopmentPython development

Repositories Contributed To

7 repos

Overview of all repositories you've contributed to across your timeline

yhyang201/sglang

Feb 2026 May 2026
4 Months active

Languages Used

PythonMarkdown

Technical Skills

CUDAPyTorchdeep learningPythonmachine learningquantization

flashinfer-ai/flashinfer

Mar 2026 Apr 2026
2 Months active

Languages Used

C++PythonCUDA

Technical Skills

CUDADeep LearningMachine LearningQuantizationTensorRTAlgorithm Optimization

bytedance-iaas/sglang

Apr 2026 Apr 2026
1 Month active

Languages Used

Python

Technical Skills

Deep LearningMachine LearningModel OptimizationPyTorchPython development

sgl-project/sglang

Apr 2026 Apr 2026
1 Month active

Languages Used

Python

Technical Skills

Backend DevelopmentDeep LearningMachine LearningModel OptimizationPyTorchQuantization Techniques

kvcache-ai/sglang

Feb 2026 Feb 2026
1 Month active

Languages Used

Python

Technical Skills

GPU programmingPyTorchdeep learningperformance optimization

ping1jing2/sglang

Apr 2026 Apr 2026
1 Month active

Languages Used

Python

Technical Skills

CUDAMachine LearningQuantizationUnit Testing

NVIDIA/TransformerEngine

Apr 2026 Apr 2026
1 Month active

Languages Used

Python

Technical Skills

Deep LearningMachine LearningPyTorchQuantization