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grimmerk - Overview

👋 Hi, I'm Grimmer Kang Linkedin

Tech Lead at Fireflies.ai, building agentic AI systems and LLM architecture for meeting intelligence at scale.

15+ years in software engineering, with a physics background (BS + MS). I've worked across AI, medical imaging, astronomy (CARTA, an international C++/JS open-source project at Academia Sinica), IoT, and streaming — primarily in TypeScript, Python, and C/C++.

Beyond code, I've built and led mobile and full-stack engineering teams and introduced Agile practices across organizations.

Currently into: LLM agent architecture, RAG systems, context engineering, MCP tooling · Contributor to the MCP TypeScript SDK

Speaker at FOSSASIA 2025 · PyCon TW · PyCon APAC · COSCUP | grimmer.io

Open-source projects

Developer Tools

  1. CodeV: macOS app — VS Code/Cursor project quick launcher, Claude Code session switcher (iTerm2, Ghostty, cmux), and AI assistant powered by Claude. Mac App Store · GitHub releases
  2. Visual Studio Code Back and Forward button — 78,000+ installs
  3. termtitle — Python CLI to change macOS terminal title. PyPI, 26,000+ downloads

Libraries

  1. d4c-queue — TypeScript in-memory task queue. Sync/async, decorators, throttle, concurrency. 100% test coverage. 15,000+ downloads
  2. @d4c/numjs — NumPy-like TypeScript lib for browser/Node.js. 20,000+ downloads

Medical Imaging

  1. Medical DICOM Image Viewer — Chrome extension + Web version, 3,000+ users. Built with Pyodide (Python in browser) + React. source

Chrome Extensions

  1. GitHub inline code color editor
  2. Gmail pagination slider
Other notable projects — AI/ML, full-stack, mobile
  • alphago-zero-tictactoe-js — AlphaZero/TensorFlow.js game framework, train or play tic-tac-toe AI in browser
  • AI+Electron face finder — Desktop app using deep learning to find similar faces. Electron + Python WebSocket server + trained NN model
  • search-github-starred — Full-text search your GitHub starred repos. React, Go, Elasticsearch, Redis
  • maolife — React Native pet respiratory rate tracker (previously published on iOS/Android)

Talks

  1. FOSSASIA Summit 2025 (Bangkok): CodeV: Streamlining Developer Workflow with an Open Source VS Code Launcher — slide · video
  2. PyCon APAC 2021 (Thailand): Use Pyodide to run Python in browsers — rendering medical DICOM files. slide · video
  3. PyConTW 2021: Use Pyodide to run Python in browsers — rendering medical DICOM files. slide · mandarin video
  4. COSCUP 2021: Synchronization & concurrency in JavaScript — introducing d4c-queue. slide · mandarin video

Pinned Loading

  1. macOS app — VS Code/Cursor project quick launcher, Claude Code session switcher, embedded terminal, and AI assistant powered by Claude

    TypeScript 2

  2. AlphaZero/TensorFlow.js game framework — train from scratch or play against a pre-trained AI in the browser. Ported from suragnair/alpha-zero-general (Python)

    TypeScript 40 6

  3. Medical DICOM P10 image viewer — Chrome extension + web app. Pyodide (Python/WebAssembly) + Pydicom parser + React. 3,000+ users

    Python 24 2

  4. TypeScript in-memory task queue — sync/async, decorators, throttle, concurrency. Browser + Node.js. 100% test coverage. 15,000+ downloads

    TypeScript 17

  5. NumPy-like numerical computing library for TypeScript/JavaScript. Browser + Node.js. Published as @d4c/numjs. 20,000+ downloads

    TypeScript 27 2

  6. Transform TypeScript classes into JSON Schema definitions with automatic support for OpenAI, Anthropic, and Google Gemini function calling (tool) formats

    TypeScript 4 1