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  • Shenzhen
  • 05:41 (UTC +08:00)

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johnsxiongs/README.md

Hi, I'm johnsxiongs 👋

📍 Shenzhen, China | 🐍 Python | 🤖 Agentic AI | 🌐 Full-Stack (Web + iOS)

Python FastAPI LangChain Node.js Vue Web PostgreSQL Redis Docker macOS SwiftUI CLI Codex Claude

I build AI-native, production-ready products: FastAPI + LangGraph/LangChain on the backend, Vue 3 on the frontend, and SwiftUI on iOS—shipped with Docker/Compose and Traefik.

Current Focus / 当前关注

  • 🤖 Agentic AI: LangGraph workflows, tool calling, tracing & evaluation (LangSmith)
  • 🧱 Backend: FastAPI, SQLModel/SQLAlchemy, PostgreSQL / TimescaleDB, Redis (streams)
  • 🖥️ Frontend: Vue 3 + TypeScript + Vite, Pinia, Naive UI, Tailwind CSS
  • 📱 iOS: Swift + SwiftUI, MVVM, RevenueCat
  • 🚀 Delivery: Docker Compose, Traefik, TLS-ready reverse proxy setup

Tech Stack (Snapshot)

Backend

  • Python, FastAPI, Uvicorn/Gunicorn
  • SQLAlchemy 2 / SQLModel, Pydantic v2
  • PostgreSQL / TimescaleDB, Redis (cache + streams)
  • Supabase Auth (JWT), bcrypt

Agent Stack

  • LangGraph, LangChain, LangSmith (tracing/eval)
  • OpenAI / Anthropic / OpenRouter (and other providers)
  • Durable checkpointing (PostgreSQL) + worker queue (Redis Streams)

Frontend

  • Vue 3, TypeScript (strict), Vite
  • Pinia, Vue Router, Vue I18n
  • Naive UI, Tailwind CSS

iOS

  • Swift, SwiftUI, MVVM
  • RevenueCat (subscriptions)

Infra

  • Docker / Compose, Traefik (reverse proxy + TLS)
  • Nginx (optional), Cloudflare (DNS/TLS automation setups)

What I Ship / 我擅长交付

  • AI Agent Platform — LangGraph/LangChain workflows, queue-based execution, SSE streaming output, tracing/eval
  • Data Pipelines — real-time ingestion (REST/WS) → stream processing → time-series storage
  • Product & Growth Infra — auth + billing + subscriptions (Supabase/Stripe/RevenueCat), iOS + Web clients kept in sync
  • Product Engineering — typed models, structured logging, testable services, dockerized delivery

GitHub

GitHub Contribution Graph

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GitHub

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  • 💬 Ask me about FastAPI, LangGraph/LangChain, PostgreSQL/TimescaleDB, Redis, Vue 3, SwiftUI
  • 🧪 I care about reliability: typed models, structured logging, and testable services

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