I build LLM applications and agent systems, backed by experience in backend engineering, distributed storage and cloud infrastructure. My interests span data pipelines, model training and fine-tuning, evaluation, inference, deployment and full-stack AI products. My public projects include Evidence Agent and Bilingual Patch Contracts. I also publish small synthetic experiments: a bilingual routing LoRA and JSON Repair Boundary Audit. I share reproducible examples, inspectable tool traces and failure analysis.