About
Cloud Infrastructure & Backend Engineer. OSS enthusiast building MCP servers, AI agents, developer tools and cloud-native services.
Cloud infrastructure and backend engineer, and an OSS enthusiast — most of what I build now is open source: MCP servers, AI agents, developer tools and cloud-native services.
Open source
I build under Theorvane — open-source developer tools for explicit contracts and inspectable systems. Small public surfaces, typed contracts, transparent capability boundaries.
| Project | What it is |
|---|---|
TypeMCP@theorvane/type-mcp |
Decorator-first TypeScript declarations and runtime tooling for Model Context Protocol servers. Definition validation, MCP SDK compilation, stdio and Streamable HTTP transports, and a tools-only LangChain adapter. |
TypeChain@theorvane/type-chain |
A decorator-first, type-safe authoring layer for LangChain JS tools and agents. @Tool() / @Agent() / @Policy() decorators, LangChain Core adapters, and an in-process TypeMCP bridge. Published through GitHub Actions Trusted Publishing. |
| OpenScene | A local-first desktop video editor with an AI agent that operates the timeline: reading a project, cutting clips, generating voice and video, exporting through local FFmpeg. Media stays on the machine and model providers are opt-in — a local Ollama engine needs no account. |
| type-mcp-api-agent-skill | An orchestration skill and deterministic CLI workspace that turns API specifications into TypeMCP repositories. |
| examples | Runnable TypeChain and TypeMCP examples with explicit runtime boundaries. |
Projects
| Project | What it is |
|---|---|
| Youth Policy MCP | Korea’s public youth-policy API exposed as MCP tools, so an assistant can search and filter policies without a bespoke integration. |
| Youth Policy Chatbot | An MCP-based policy assistant built on top of that server. |
| YouthPick | A personalised youth-policy platform on Spring Boot 3.5, Java 21 and React 19. Team lead of five; owned the auth, admin, chat, file and profile domains end to end. |
| KOSA final project | Hybrid Proxmox and AWS infrastructure automation: four physical servers, 25 VMs and a Kubernetes HA cluster provisioned with Terraform and Ansible. Infrastructure lead of five. |
Certifications
- AWS Certified Solutions Architect – Associate
- HashiCorp Certified: Terraform Associate
- Engineer Information Processing · SQL Developer (SQLD)
Contact
- Email — sjungwon03@gmail.com
- GitHub — github.com/sjungwon03
Full detail is on the résumé page.