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CislinkNL/README.md

Hi there, I'm Junyi Zhu ๐Ÿ‘‹

AI-Augmented Cloud Architect | Python Specialist | SaaS Founder

Python Vue Nuxt TypeScript Google Cloud Firebase Kotlin Gemini Claude

๐Ÿ“ Groningen, The Netherlands | ๐Ÿค Open to Hybrid/On-site | ๐Ÿ“ง [email protected]


๐ŸŽฏ The Hybrid Architect

I bridge the gap between Enterprise Stability and AI Innovation.

Leveraging advanced AI workflows (Gemini/Claude) to deliver production-grade systems with 3x efficiency.

๐Ÿ“– My Philosophy: AI-Native Development โ†’

I build scalable cloud-native solutions that combine:

  • Enterprise-grade reliability โ€” Event-driven architectures, zero-downtime deployments
  • AI-first development โ€” LLM-powered agents, real-time voice AI, intelligent automation
  • Full-stack delivery โ€” From bare metal (IoT/Android) to serverless backends

๐Ÿ† Featured Projects

Project Stack Impact
๐Ÿงพ Cislink Cloud Invoice Engine Python GCP Pub/Sub Event-driven architecture automating billing for 1000+ clients. Zero-maintenance serverless design. Processes โ‚ฌ50K+ monthly invoices; reduced processing time from 2 hours โ†’ 10 seconds.
๐Ÿค– Real-time AI Voice Operator Python Gemini Twilio Autonomous voice agent handling restaurant reservations via phone. Replaces traditional IVR with GenAI. Deployed on Google Cloud Run; sends WhatsApp confirmations. Demo: +3197010256688
๐ŸŒ Multi-Tenant Food Delivery Platform Vue Nuxt TypeScript Startup venture, full-stack solo development. Multi-tenant Nuxt 3 app for 500+ restaurants. Dynamic theming, Stripe payments (iDEAL/Bancontact), Firebase Realtime DB, location-based routing. Currently in prototype device testing phase.
๐Ÿฝ๏ธ De Langemuur Restaurant Platform Next.js Firebase Python End-to-end restaurant system: Booking website (Next.js) โ†’ Firebase โ†’ Cloud Functions โ†’ C-language POS integration. QR ordering + Staff panel + WhatsApp notifications.
๐Ÿ“ฑ Multi-Tenant POS Ecosystem Kotlin Firebase IoT End-to-end restaurant platform: Android POS + Cloud backend + Kitchen printers. Dual-engine (Go+Python) print server for 100% uptime.

๐Ÿ› ๏ธ Technical Arsenal

Cloud & Backend

  • Languages: Python (3.11+), Go (Golang), Kotlin, TypeScript
  • Cloud Platforms: Google Cloud Platform (Cloud Run, Cloud Functions, Pub/Sub, Firestore)
  • Architecture: Event-driven, Serverless, Microservices
  • Databases: Firestore (NoSQL), PostgreSQL, Firebase Realtime Database

AI & LLMs

  • Models: Gemini 2.5 Flash Native Audio (preview-12-2025), Claude 4.5, GPT-5.2
  • Applications: Real-time voice AI, Function Calling, Agentic systems, Multi-step workflows
  • Integration: WebRTC, WebSocket, Twilio Media Streams

DevOps & Infrastructure

  • Containerization: Docker, Cloud Run
  • CI/CD: GitHub Actions, Cloud Build
  • Monitoring: Cloud Logging, Cloud Monitoring
  • Hardware: ESC/POS thermal printers, Android devices

๐Ÿš€ Live Demo: AI-Augmented Automation

Experience my Python & Cloud automation in action:

Live Demo

What happens behind the scenes:

  1. Frontend (GitHub Pages) captures your request
  2. GCP Cloud Function (Python 3.11) generates a professional PDF on-the-fly
  3. Gmail API (OAuth2) delivers it securely

Tech Stack: Python 3.11 ยท GCP Cloud Functions (Gen 2) ยท fpdf2 ยท GitHub Pages


๐Ÿ“ˆ Architectural Preview

Event-driven architecture I designed for scalability and fault tolerance:

graph TD
    subgraph Clients
        Web[Web Dashboard]
        POS[Android POS]
    end

    subgraph "GCP Serverless"
        API[API Gateway / Cloud Functions]
        Auth[Firebase Auth]

        subgraph "Async Processing"
            PubSub{Pub/Sub}
            Worker[Invoice Generator]
        end

        DB[(Firestore)]
        Storage[(Cloud Storage)]
    end

    Web -->|HTTPS| API
    POS -->|HTTPS| API
    API -->|Trigger| PubSub
    PubSub -->|Push| Worker
    Worker -->|Read/Write| DB
    Worker -->|Store| Storage

    style Worker fill:#4285F4,stroke:#fff,color:#fff
    style PubSub fill:#FBBC05,stroke:#fff,color:#333
    style DB fill:#EA4335,stroke:#fff,color:#fff
Loading

๐Ÿ’ผ Why I'm the Right Match

  • ๐Ÿ“ Local to Groningen โ€” Immediately available, no relocation needed
  • ๐Ÿ—ฃ๏ธ Native Dutch โ€” Fluent in the language of the workplace and clients
  • โ˜๏ธ Cloud-Native Expertise โ€” Deep experience with Python 3.11+, GCP, event-driven architectures
  • ๐Ÿค– AI-Driven Workflow โ€” 3-5x productivity boost through strategic AI (Gemini/Claude) integration
  • ๐Ÿš€ Entrepreneurial DNA โ€” Solo-founder of multi-tenant SaaS platforms (Cislink)
  • ๐Ÿ”ง Full-Stack Delivery โ€” From cloud infra & Python backends to Android (Kotlin)

๐Ÿ“ฌ Get In Touch


Built with โšก by an AI-augmented developer in Groningen, Netherlands

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