Full-stack Engineer @ Soundmind · Founding Member @ WIGTN Crew
Building harnesses for AI workflows · Designing systems that run without humans in the loop

Portfolio · WIGTN · WIGTN-Coding Plugin

I work at the intersection of B2B operational systems and AI-native engineering.

• Designed a multi-tenant auth & permission platform from scratch, serving multiple B2B partners on a single infrastructure
• Solved high-throughput operational issues — reduced DB write load by 95% under 3,000~5,000 events/min
• Building open-source harnesses that let AI agents produce consistent, verifiable output without human intervention
• Won ByteDance Build with TRAE Hackathon (Grand Prize) and Snowflake AI & Data Hackathon Korea (Runner-up) with multi-agent verification workflows

"Systems run reliably not because someone patches them every time, but because they're built to not break without a human in the loop."

Frontend & Mobile

Backend & Data

AI & DevOps

Working on a B2B platform that ships pre-installed child-safety services to OEM devices (e.g., Galaxy Kids phones) via partners like Norang Market.

• Designed solo — a single auth infrastructure serving multiple white-label partner services
• Token Rotation + Token Family Tracking to detect refresh-token reuse attacks
• RBAC, PII lifecycle automation, Audit Log for full operational traceability
• Retry + DLQ with a recovery console for partial-failure recovery without ops handholding

• Redis buffering + batch processing redesign → 95% reduction in DB write load at 3,000~5,000 events/min
• Haversine-based safe-zone entry/exit detection
• OTA pipeline with HotUpdater + Supabase
• Contributed to ~230% B2B revenue growth through platform stabilization

• Real-time app monitoring & blocking via Android AccessibilityService
• Samsung Knox Firewall integration for domain-level access control
• Diagnosed and eliminated recurring ANR caused by RN Bridge Queue + Knox IPC + Broadcast timeout

• Full-stack Next.js + Prisma + PostgreSQL platform for foreign-student Korean proficiency evaluation
• 16kHz WAV recording → AWS S3 → external STT pipeline

Founding member of WIGTN, a 5-person AI engineering crew building harnesses and tools for AI-native development.

A plugin that lets multiple AI agents collaborate on real codebases without losing context or quality.

• Role-based SKILL.md definitions for PRD writing, architecture design, parallel development, and code review
• Validation gates between stages — only output that passes quality checks advances
• Designed for teams: the same workflow that works for one developer scales to many
• → Repo: https://github.com/wigtn/wigtn-plugins-with-claude-code

• 🏆 Grand Prize — ByteDance Build with TRAE Hackathon (multi-agent debate platform with built-in verification)
• 🥈 Runner-up — Snowflake AI & Data Hackathon Korea

🌐 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.