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libterty/README.md

Hi, I'm YunChen 👋

Engineering Manager / Staff Engineer | Backend & Cloud Systems | AI Engineering

I build backend systems, lead engineering teams, and explore how AI can improve real engineering workflows.

My background is mainly in distributed systems, IoT platforms, cloud infrastructure, and engineering leadership. More recently, I've been building RAG systems, AI agents, and reusable AI workflows for software engineering and engineering management.


🚀 Featured Projects

A Terraform private registry example repo

An AI career analysis platform I built to experiment with RAG, multi-agent workflows, and evidence-based decision making.

A collection of reusable AI skills built from engineering management problems I've encountered in practice.


📈 Selected Experience

IoT & Cloud Platforms

  • Helped scale an IoT product portfolio by approximately 10× while keeping infrastructure growth under control
  • Reduced AWS OpenSearch costs by approximately 50% through data lifecycle and storage architecture redesign
  • Built and operated systems for telemetry, alerts, location tracking, video streaming, and device integration
  • Established CI/CD, automated testing, observability, and production operation practices across multiple product lines

Engineering Leadership

  • Led cross-functional engineering teams across backend, frontend, firmware, DevOps, and UI/UX
  • Worked across architecture, delivery, hiring, mentoring, and stakeholder alignment
  • Stayed hands-on with architecture reviews, production issues, and difficult technical problems

AI Engineering

  • Built RAG systems using dense + keyword hybrid retrieval
  • Designed multi-agent workflows with specialist agents and supervisor routing
  • Developed evaluation and feedback loops for improving agent reliability
  • Created reusable AI workflows for engineering management and technical decision-making

🛠️ Tech Stack

Backend
Node.js · TypeScript · Python · Golang

Cloud & Infrastructure
AWS · GCP · Kubernetes · EKS · Docker · Pulumi · Helm

Data & Messaging
PostgreSQL · Redis · Kafka · NSQ · OpenSearch · Milvus

AI Engineering
RAG · Agent Systems · Vector Search · Hybrid Retrieval · Ollama · VoltAgent

Observability
OpenTelemetry · Grafana · Loki · Tempo

Architecture
Distributed Systems · Event-Driven Architecture · DDD · Microservices · Multi-Tenant Platforms


📫 Contact

LinkedIn · Medium

@libterty's activity is private