Yi-Jyun Pan

About me

I am a full-stack developer with expertise in a wide range of technologies.

• Frontend: Mainly using React.js, TypeScript, and Next.js. Use Vue.js, Nuxt, and Vite for small projects.
• Backend: Mainly using Go, Rust, PHP, and Node.js.
• Cloud: For PaaS solutions, I have extensive experience with Zeabur and Vercel, ensuring applications run seamlessly on such platforms. I am also familiar with object storages like S3, CDN configurations on Cloudflare and Bunny CDN.
• Infrastructure: My works on Zeabur involve a lot of Kubernetes, Docker, and Git. For example, I can set up a simple Kubernetes cluster with K3s, manage it, and deploy applications to it with Helm or generic YAML manifests. I can also set up a CI/CD pipeline using GitHub Actions.
• Large Language Models: I am proficient in various models, including GPT, Claude, Gemini, DeepSeek, Perplexity, and others. I understand their optimal use cases and API integrations. I can develop an LLM Agent using LangChain and the Vercel AI SDK. Additionally, I can build a RAG pipeline with LangChain utilizing Voyage AI's models, and create an MCP server for general tools for agents.
• Apple Ecosystem: I design apps using Swift for the Apple ecosystem and React Native as an amateur. I have experience with the development of macOS and iOS apps, such as and helping improve concurrency in some Swift projects.
• Engineering Practices: I am familiar with established contribution flows and committing guidelines, such as . I respect the linters, formatters, and type checkers.
• Designing: I am familiar with established contribution flows and committing guidelines, such as . I respect the linters, formatters, and type checkers.

I prefer cloud-native and scalable solutions. I have applied microservice architectures and techniques on several projects, which you can find on the Projects section.

I consistently explore best practices and scalable solutions in software engineering, and share my finding on Threads, X and my blog. Feel free to share your opinions with me!

I am an active contributor to open-source projects such as Symfony, Git, Keka, and various GNU software. Additionally, I actively participate in several developer communities on Telegram and Discord, where you can often find me.

Projects

Most of my exciting projects are open-sourced on my GitHub (pan93412) and the organization I created. I have pinned some projects that showcase my skills. I also maintain a blog (blog.pan93.com), where I share my thoughts and technical insights.

• 2025/12 - Virtual Doctor (Python, not open-sourced yet): A virtual doctor project for the graduation project of NKUST IC, written in Python. This project serves as a virtual doctor for elderly individuals, retrieving medical knowledge from our internal database using RAG. It assesses the user's health condition with MCP and integrates this information with a large language model (LLM) to provide daily life recommendations. Additionally, it offers a digital doctor based on LiveTalking, which mimics the doctor's voice and lip movements, helping elderly patients feel more comfortable and engaged, as if they are conversing with a real doctor.
• 2025/08 - Database Playground (Go): This is a rewrite of the previous Symfony-based SQL practice platform, which also serves as an NSTC Undergraduate Research ('25) project. It focuses on AI agents and high extensibility. The platform is built on Go for the backend and SQL runner, without using any framework, and Next.js for the frontend and admin interface. It incorporates the Vercel AI SDK for LLM integrations and PostHog for product analytics, LLM observability, and behavior tracking. The project faces challenges in security, such as OAuth and permission management, as well as scalability, including database replication and microservices. All components and tech choices are open-sourced on GitHub as documentation.
• 2025/07 - COSCUP 2025 - Sessions page: A completely-rewritten sessions page for COSCUP 2025, built with VitePress, features a responsive design that works on both desktop and mobile devices. It addresses many limitations of the platform, such as pre-rendering all session pages, minimizing the bundle size, and working around the Pretalx API limitations.
• 2025/04 - NKUST Crawler Projects: A crawler project for the NKUST IC data analysis course, written in Go. The toolkits can crawl and scrape data from Yahoo News, Dcard, PTT, Mobile01, and more. They also perform data cleaning and visualization using Streamlit.
• 2024/12 - YOLO-RS: A Rust implementation of YOLO (You Only Look Once), a real-time object detection algorithm, achieves 17 FPS with the largest YOLO model (YOLO11x).
• 2024/12 - NKUST IC IoT Projects (Rust): An extended project for the IoT course that quickly detects and alerts for intruders, using software with GStreamer for the webcams. It is written in Rust and employs a microservice architecture, incorporating Cloudflare R2, GraphQL, NATS, PostgreSQL, GStreamer, YOLO, and more. It is designed for asynchronous operations and the worker pattern.
• 2024/07 - Database Playground (PHP): A SQL practice platform for our course, also serving as an NSTC Undergraduate Research ('24) project ("Use reminders and reference feedback mechanisms realized by GPT models in generating personalized content to enhance students' willingness to learn: A case study of a database learning gamification platform"). It is built on Symfony, with Go used for performance-critical services such as the SQL runner.
• 2024/06 - NKUST IC IoT Projects (Go): A final project for the IoT course that can quickly detect and alert for intruders, based on the Raspberry Pi 3 hardware. It is written in Go and uses a microservice architecture, incorporating RabbitMQ, GraphQL, gRPC, OpenTelemetry, mTLS, PostgreSQL, and more.

Experiences

Slides

• Cursor Meetup Taipei (June 2025): Vibe in the efficient way (
  Slide
  )
• SITCON 2025: 選課卡成狗？微服務架構帶你翻轉校園系統 (
  Slide, 

  SITCON, 

  Article
  )
• MOPCON 2024: 導入可監控性：OpenTelemetry 實踐和 Request ID 實作 (
  Slide, 

  MOPCON
  )
• PyCon 2024: 如何將 Python 程式碼的環境遷移到其他地方？ (
  Article, 

  Slide, 

  PyCon
  )
• DevFest 2022: 透過重構實戰，探索 Web App DX 和 UX 的最佳做法 (
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  GDG
  )
• MOPCON 2021: 應到未到，一看就知道！ (
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  MOPCON
  )

Referrals

These links are referral links for my recommended products and services. If you are interested in any of them, please feel free to use my referral links to register. It supports both the services and me.