Kay Kim
Building is no longer
the bottleneck
Twenty years spent reading systems other people built. I turn codebases into maps so humans and AI can reason on the same structure.
Based in Jeju · Working remotely with companies in Japan & Korea
The Shift
As building got faster, understanding became the bottleneck
AI writes the code. But nobody knows what that code touches.
So this is what happens now
Nobody can verify what the AI wrote
When the owner leaves, the codebase becomes a black box
You ship without knowing what breaks when you change something
Understanding Layer
Know where a feature starts and what breaks when you change it — without reading every line
Every codebase flows through four layers
UI · CLI · API · webhook · scheduler
service · handler · usecase · reducer
DB · file · cache · queue · external API
server · container · cloud · auth · CI/CD
Reading a codebase comes down to six questions
The language and framework change. These questions do not.
Proven with tools, not slides
Could you explain your codebase right now?
Where it starts, what it touches, what breaks when you change it — we start with a diagnosis
Request a codebase auditAbout Kay
Twenty years of reading systems other people built
AI Native Technical Leader · Freelance
Freelance (Jeju)
Based in Jeju, collaborating with companies in Japan and Korea. Maintaining bkit & tene open source, and building tene studio.
CIO (Chief Innovation Officer)
POPUP STUDIO
Leading dev innovation with AI Native methodology and tools
Tech Lead & AI Driven Lead
POPUP STUDIO
Full-stack Builder with Tech & Business capability
CIO & CTO
Wemeet Mobility
Launched logistics solution in 5 weeks with 6-person team
Capabilities
Understand it, control it, make it safe to delegate
Codebase Comprehension
Map structure and data flow in any language or framework
Change Impact Analysis
Know what breaks before you change it
AI Grounding
Let AI work from real structure via MCP, not guesses
Vibe Coding Verification
Turn AI-generated output into something you can accept
Legacy Takeover
Regain control of a codebase whose owner is gone
Architecture Design
MSA, Kubernetes, GitOps-based infrastructure
Full-Stack Execution
End-to-end from infrastructure to frontend
Japan–Korea Bridge
From Japan's No.1 consulting firm, business experience in both markets
Skills
Tech Stack and Capabilities
AI & Automation
+3 more • Hover to expand
Frontend
+2 more • Hover to expand
Backend
+2 more • Hover to expand
Infrastructure
+2 more • Hover to expand
Database
+2 more • Hover to expand
Work With Me
I make AI-generated code trustworthy
Based in Jeju, working remotely with companies in Japan & Korea. Let's talk about your codebase.
What is your situation right now?