Yang Lu

AI Engineer — RAG, agent workflows, and LLM evaluation

I build practical LLM systems with a software engineering foundation: retrieval-grounded applications, agent workflows, evaluation tooling, and reliability improvements for AI agent infrastructure. 5 years of software development experience across backend, full-stack, and applied AI engineering.

Projects

RAG Resume Agent

LangChain · Chroma · Hugging Face Spaces

Retrieval-grounded resume Q&A app with a multi-model evaluation pass. Deployed on Hugging Face Spaces; evolved into an open-source LLM evaluation toolkit with parallel judge scoring and structured scoring outputs.

PythonStreamlitLangChainChromaHugging Face SpacesLLM-as-judge

LLM Evaluation Toolkit

Open source · parallel judge scoring

Reusable evaluation pipeline for LLM outputs: prompt-versioned scoring rubrics, parallel judge calls, and reliability checks. Built from the evaluation needs of the resume agent project.

PythonOpenRouterZ.AIpytest

Interview Copilot

RealtimeSTT · streaming LLM · ~4s latency

Real-time interview assistant: local speech-to-text, streaming model responses, system-audio capture, and screen context tagging. Runs fully on local hardware.

PythonRealtimeSTTsounddeviceOllama

Experience snapshot

Independent AI Engineer — Open Source & R&D

AI Integration Solutions · 2024 – Present

Building RAG systems, LLM evaluation tooling, and AI-agent infrastructure projects with public artifacts.

Back-End Developer

Alaia Technologies · 2016 – 2020

Java/Spring services, multithreaded batch data loaders, MySQL schema work, and Linux/GCP operations for real-estate data integrations.

Core stack

PythonTypeScriptJavaFastAPIReactLangChainRAGChromaOpenRouterZ.AIDockerGitHub ActionsAWS (EC2/S3/Lambda)MySQLpytest