Chao Fan

Building High-Scale Systems& AI Agents for Millions of Users

Software Engineer blending high-scale distributed systems with modern web applications. With experience serving 10M+ users at HelloFresh, I specialize in building event-driven architectures (Golang/Node.js) and orchestrating LLM agents (LangGraph/AWS Bedrock) to deliver personalized user experiences.

High-Scale Architecture: Engineered microservices serving 10M+ users with 99.5% uptime

AI Agent Orchestration: Built RAG pipelines using Vector Embeddings and LangGraph for personalized recommendations

Performance Optimization: Reduced API latency by 54% via gRPC aggregation and event streaming

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Technical Skills

Technologies and tools I work with to build modern, scalable applications

Languages

TypeScript/JavaScriptGolangPythonSQL

Frontend

ReactNext.jsReduxServer-Side Rendering

Backend & Microservices

Node.js/ExpressGolanggRPCREST APIs

AI & Machine Learning

LangGraphAWS BedrockVector SearchRAG Pipelines

Data & Messaging

MySQLRedisKafkaRabbitMQ

Cloud & Infrastructure

KubernetesAWS (EC2, S3, EKS)DockerCloudflare

Observability & DevOps

OpenTelemetryGrafana & PrometheusArgoCDCI/CD

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