I build software at the intersection of AI agents, backend systems, and cloud infrastructure.

I'm interested in how AI agents can transform software from passive tools into active collaborators.

My work spans agentic workflows, retrieval systems, backend infrastructure, and product development, with a focus on building practical AI applications that people actually use.

AI-powered newsletter automation platform that collects, deduplicates, summarizes, and delivers personalized news digests.

Stack Next.js Express.js Python LangChain AWS Lambda RDS S3 SES EventBridge Docker

🔗 https://github.com/lighteko/infoscribe

PM-Agent driven task management platform for planning, execution, and team productivity.

Stack TypeScript Next.js Zustand Tanstack Query NestJS Python Pydantic AI PostgreSQL pgvector Supabase Docker OCI Email Delivery Queues Functions Object Storage Compute GitHub Webhooks

🔗 https://github.com/Prism-416

AI trainer and workout logging application designed around personalized coaching and retrieval-augmented fitness guidance.

Stack React Native NestJS Python PostgreSQL Qdrant Supabase Streaming

🔗 https://github.com/lighteko/reppy

• LinkedIn: https://www.linkedin.com/in/heejoon-yi/
• Email: dev.lighteko@gmail.com