Software Engineer — Backend & Platform

I build and own production backends end-to-end — APIs, databases, authentication, payments, real-time systems, and the infrastructure that runs them. Most of my work is in the TypeScript / Node.js ecosystem, with a strong focus on PostgreSQL, microservices, and observability.

• 🛠️ Backend, data, and infrastructure across 9 products at CMON
• 🧩 I like reusable platform foundations — gRPC auth services, typed schema packages, Docker / Nginx deploys
• 🤖 Hands-on AI product integration — multiple LLM providers, RAG, and AI-agent-assisted development

Selected work

• BetterPrompt — AI prompt marketplace platform · lead/sole backend (API, workers, 40+ AI models across 3 providers)
• Savvy — AI personal-finance app · platform/backend lead (Temporal & BullMQ workflows, gRPC auth, cross-platform billing)
• C'mon esports — live fan-engagement platform · lead backend (real-time voting & chat, OAuth, Stripe, AWS)

Tech I work with

TypeScript · Node.js · Bun · PostgreSQL · Drizzle ORM · Redis · gRPC · Docker · Nginx · OpenTelemetry · Next.js

Reach me

• 📫 hi@yuntian.dev
• 🌐 github.com/yuntian3008 (personal account)
• 📍 Ho Chi Minh City, Vietnam