Jeong Woo Chang

I build things for the web.

Software Engineer with 11 years across startups and Big Tech. Currently building an AI-native CRM at Lightfield.

Experience

2025 —

AI-native CRM for startups. Building core product across the full stack.

2022 — 25

AI presentation tool. Built AI features (text, slides, image generation), analytics, enterprise templates.

2021 — 22

Built Metaverse Avatar Storefront for Family of Apps (FB, IG, Messenger, WhatsApp, Oculus). Owned payments and internal tools.

2020 — 21

Analytics for e-signatures. Visualized signing flows to help admins identify bottlenecks.

2016 — 20

Azure Portal. Built SDK and components for 80+ teams building portal extensions.

2011 — 13

Real-time auction e-commerce. Pioneered modern payments and UX in 2010s Korea.

RAG systems, OpenAI APIs, AI image generation. Direct collaboration with OpenAI and StabilityAI.

Build optimization, CI/CD pipelines, developer tooling. Biome, tsgo, GritQL.

Collaborative editing (Y.js/CRDT), WebSockets, GraphQL subscriptions.

React/Next.js frontend, Node.js backend, PostgreSQL, test infrastructure.

Technologies

React · Next.js · TypeScript · Node.js · GraphQL · PostgreSQL · Redis · AWS · Docker · Tailwind · GitHub Actions · Y.js · Vercel · Biome

Always happy to connect and talk about interesting problems.