Systems/Full-Stack Engineer — Native C/JS Bridges, Real-Time Rendering, AI Agent Orchestration (Seoul, South Korea)
11 years, mostly as the entire engineering org at small companies. Built a commercial
eye-tracking product end to end at ReadersEye: wrote the C-library-to-JavaScript native
addon myself (Tobii's C SDK bridged through a Node addon into an Electron/React desktop
client), and compiled the same vision pipeline to WebAssembly (SIMD, SharedArrayBuffer
zero-copy) for a browser version rendering real-time gaze heatmaps and scanpaths at 30fps.
The backend was NestJS on MySQL/MongoDB/Redis, deployed on AWS, with a dedicated
Socket.io/WebSocket service for real-time delivery and a FastAPI service scoring reading
performance from gaze data. More recently I built a multi-agent AI orchestration platform
I run from my phone, local-first, with a small team living in it now.
Comfortable across C, JavaScript/TypeScript, and Python. Writing is where I'm strongest
— most of my collaboration for the past decade has been async and written, so I work
well with distributed, async-first teams.
Remote: Yes (remote only)
Willing to relocate: No
Technologies: Languages — C, JavaScript/TypeScript, Python, Java. Full-stack — React, React Native, Next.js, Node.js, NestJS, Express, FastAPI, Django, Spring. Systems/Realtime — WebAssembly (Emscripten, SIMD, SharedArrayBuffer), Node native addons (node-gyp, N-API), Electron, WebSocket, Socket.io. ML — TensorFlow, PyTorch. Infra — AWS, GCP, Docker, GitHub Actions, nginx, MySQL, MongoDB, Redis. AI agent orchestration.
Portfolio: https://ssogi.com
Email: ssogi@ssogi.com
Systems/Full-Stack Engineer — Native C/JS Bridges, Real-Time Rendering, AI Agent Orchestration (Seoul, South Korea)
11 years, mostly as the entire engineering org at small companies. Built a commercial eye-tracking product end to end at ReadersEye: wrote the C-library-to-JavaScript native addon myself (Tobii's C SDK bridged through a Node addon into an Electron/React desktop client), and compiled the same vision pipeline to WebAssembly (SIMD, SharedArrayBuffer zero-copy) for a browser version rendering real-time gaze heatmaps and scanpaths at 30fps. The backend was NestJS on MySQL/MongoDB/Redis, deployed on AWS, with a dedicated Socket.io/WebSocket service for real-time delivery and a FastAPI service scoring reading performance from gaze data. More recently I built a multi-agent AI orchestration platform I run from my phone, local-first, with a small team living in it now.
Comfortable across C, JavaScript/TypeScript, and Python. Writing is where I'm strongest — most of my collaboration for the past decade has been async and written, so I work well with distributed, async-first teams.