Yu-Jun Wen (Wen)

AI Engineer | Data Scientist | Data Engineer | Backend Engineer

Email: [email protected]

LinkedIn | GitHub | Blog (New) | Blog（96 articles, 79K+ page views）

Skills

Languages Python, Go, SQL

LLM Engineering RAG Systems, Prompt Engineering, LLM Evaluation, LangChain, LangGraph, LangFuse

Machine Learning PyTorch, TensorFlow/Keras, Anomaly Detection

Backend Systems FastAPI, Gin, API Design (REST, OpenAPI)

Data Systems PySpark, PostgreSQL, Data Processing Pipelines

Cloud & DevOps AWS (EKS, Lambda, S3, SQS, Athena), Kubernetes, Docker, Terraform, CI/CD

Work Experience

Zhanwei AI | Senior AI Engineer (Jun 2026 – Present)

Company: Early-stage startup

Founding Engineer & Agentic System Development

• Serve as founding engineer, owning the full product lifecycle from PRD to production — covering technical scoping, system design, architecture decisions, and hands-on development.
• Independently designed and shipped an agentic platform for mission-critical, irreversible infrastructure operations in 2 months — entering an unfamiliar domain cold and driving it from survey and POC to three live, cooperating systems that separate judgment from execution: a conversational human-in-the-loop planning agent, a deterministic workflow engine, and a failure knowledge base that turns operational failures into retrievable knowledge.