AI Product Engineer @ WIGTN
AI agents · Agent harnesses · Auth & access control
CV · Portfolio · WIGTN · WIGTN-Coding Plugin
I build AI agents that hold up in production, and the backend underneath them.
- Co-develop WIGTN-Coding, an open-source AI development workflow harness for Claude Code and Codex, with verification gates at the planning, review, and commit stages.
- Led the MX team at Soundmind, building the auth server, backend, and mobile apps for B2B kids' phones. Cut DB write load by 95% with Redis batching and added token-reuse detection, RBAC, and webhook-based auth events.
- Build multi-agent systems at hackathons: Grand Prize at ByteDance Build with TRAE Seoul and 2nd Place (Tech Track) at Snowflake AI & Data Hackathon 2026 Korea.
- Co-author of papers at ACL 2026 System Demonstrations and EMNLP 2026 Industry Track.
Founding member of WIGTN, a 5-person AI engineering crew building harnesses and tools for AI-native development.
Open-source harness for Claude Code and Codex that takes AI-assisted work from PRD to release.
- PRD writing, task planning, requirement verification, and release checks in one skill pipeline
- Verification gates at the planning, review, and commit stages, with a commit hook that blocks failed checks
- Repos: Claude Code · Codex
- 🏆 Grand Prize, ByteDance Build with TRAE Seoul (WIGENT, multi-agent debate platform)
- 🥈 2nd Place, Tech Track, Snowflake AI & Data Hackathon 2026 Korea (WIGTN FLAKE)
- 🎖️ Top 6, OBA Weekendthon Season 1 (Myunzy)
🌐 Portfolio: https://kims-portfolio-six.vercel.app/
- 🇰🇷 Korean (Native)
- 🇺🇸 English (Professional)
- 🇩🇪 German (Basic)
- 🇯🇵 Japanese (Learning)
Open to conversations about AI harnesses, multi-agent workflows, and enterprise-grade AI systems. Reach out anytime at hyeonsang@wigtn.com.