AI engineering / platform engineering / senior full-stack engineer focused on making AI useful in real engineering workflows.

I currently work on FinTech engineering at PayPal, with recent focus on AI-assisted payment migration validation, multi-stack e-commerce test environments, Docker / Makefile workflows, Playwright E2E validation, and evidence-driven engineering loops.

I care less about one-off AI demos and more about systems that are runnable, reproducible, testable, and explainable.

🔍 Open to opportunities

• AI-assisted engineering workflows for real software systems
• Agent workflow design with planning, execution, independent evaluation, and evidence collection
• Multi-language payment validation environments with Docker, Makefile, and Playwright
• Developer tools, CLI workflows, prompt systems, memory systems, and MCP-based code context
• Full-stack systems with React, Next.js, Node.js, TypeScript, Python, FastAPI, Redis, and APIs

📍 Shanghai, China

🌐 https://erishen.cn

An AutoGen-based exploration of Planner / Specialist / Evaluator agent workflows, focusing on task decomposition, execution, independent review, and evidence-driven iteration.

Personal experiments around agent design, workflow orchestration, tool usage, and practical AI execution patterns.

An OpenAI Function Calling-compatible tool registry and CLI for exposing local tools through standardized schemas and agent-friendly interfaces.

A practical LLM toolkit built with LangChain and LiteLLM, supporting chat, RAG document Q&A, hybrid retrieval, streaming APIs, evaluation, and cost-aware usage patterns.

Demo: https://langchain-llm-toolkit.onrender.com/docs

A modern AI chat application with streaming responses, RAG document retrieval, Markdown rendering, theme switching, and practical conversation workflows.

Demo: https://chat.erishen.cn

A personal AI chat application focused on clean interaction, local-first workflows, streaming responses, and lightweight AI product experience.

A full-stack scaffolding and code generation CLI for Next.js, Express, GraphQL, MySQL, TypeScript, CRUD modules, and project initialization.

NPM: https://www.npmjs.com/package/nsgm-cli

A self-hosted shadcn/ui component registry with Storybook documentation, exploring internal component distribution and frontend platform patterns.

AI Engineering
Agent workflows, tool calling, MCP, RAG, evaluation loops, prompt systems, memory systems, SSE execution logs.

Platform Engineering
Docker, Makefile, multi-stack environments, reproducible workflows, local tooling, developer productivity.

Full-Stack Systems
React, Next.js, TypeScript, Node.js, Python, FastAPI, Redis, GraphQL, REST APIs, Playwright.

FinTech / Payment Validation
Payment flow validation, API behavior research, migration rules, E2E evidence, sandbox behavior analysis.

• PayPal — Full-Stack Engineer (2024 – Present)
  FinTech systems, payment migration validation, multi-stack test environments, AI-assisted engineering workflows, identity verification
• Trip.com (Ctrip) — Senior Frontend Engineer (2017 – 2024)
  International content platforms, Node.js SSR, SEO, multilingual content, frontend engineering evolution
• Earlier — Software Engineer → Technical Manager (2005 – 2017)
  Enterprise systems, mobile apps, embedded web, cross-team delivery

• Website: https://erishen.cn
• GitHub: https://github.com/erishen
• Email: erishen@qq.com