Chanjoong Kim

AI undergrad at Kookmin University, on the ground in Irvine, CA. I work on AI Agents, multi-agent systems, LLM/RAG, GNNs, and efficient ML — shipping real things, not just notebooks.
Looking for Fall 2026 internships
ML Engineer · AI Engineer · SWE
Projects
reflect
2026
Selected for Built with Opus 4.7 Hackathon (Anthropic × Cerebral Valley, 1 of 500 from 20,000+, 2.4%). Session-local metacognition harness for Claude Code: 3-tier weighted revert detector + 3-layer prompt cache, 95.9% L1 hit, ~$0.01 warm reflections.
TypeScript · Anthropic SDK (Opus 4.7) · Claude Code hooks · OIDC + Sigstore SLSA v1
npm Code
stetkeep
2026
Open-source Claude Code plugin preventing AI over-refactoring via XML-structured behavior protocols. 5-layer enforcement (deny-lists, hooks, tool-scoped subagents, path rules, protocols) + 16-entry false-positive catalog. Zero runtime deps.
Node.js · Claude Code Plugin API · Prompt Engineering · OIDC + Sigstore
npm Code
My Offer Agent
2026
AI career assistant orchestrating 6 specialized agents with structured handoff chains. Server-side regex pre-routing fixed non-deterministic LLM routing. Client-side PDF parsing, ATS scoring (100-pt rubric, Zod), live job search.
Next.js · OpenAI Agents SDK · Cloudflare Workers
↗ Live Code
microgpt-efficiency
2026
Karpathy's microgpt across scalar/NumPy/PyTorch CPU/CUDA backends. ~250× speedup (NumPy vs scalar) at the same final loss. Exact backward passes for RMSNorm, softmax, causal attention; verified via finite differences.
Python · NumPy · PyTorch · CUDA
Code
LayerCal
2026
Browser-based NN calculator. 14 layer types, real-time param/FLOPs/memory, PyTorch/TF/JAX codegen. Client-side RAG over 12 architectures, BYOK multi-LLM with auto-correct dimension validation. 85 tests, GH Actions CI.
React · Vite · Tailwind · Gemini/OpenAI/Claude · Vitest · Cloudflare Pages
↗ Live Code
MobileViT PTQ
2025
From-scratch MobileViT + PTQ. INT8: 3–3.6× compression at ~91% acc. FX tracing via monkey-patching. Non-monotonic INT4 traced to per-channel weight granularity.
PyTorch · FX Graph Mode Quantization
Code
Research & Publications
SAIL Lab
Jul 2025 – Jan 2026
Graph Transformer for multi-component refractive index prediction
R² 0.69 → 0.98 via mole-fraction atom embeddings. 57K samples, multi-temperature.
EAIC Lab
Nov 2024 – Jun 2025
Efficient architectures & model compression survey
ResNet/MobileNet from-scratch reimplementation. Pruning & PTQ methods.
Oct 2025
KCS 136th General Meeting — 2 posters
1st author: Refractive index prediction via GNN · 2nd author: ML-based solubility prediction across temperatures
Experience
Mar 2026 – Present
Global PBL Program
Kookmin University → Irvine, CA · AI Agents, LLM Applications, On-device AI
Aug – Nov 2025
Operations Supporter, B2B Shopping
Toss CX · ~1,500 LLM-classified products/day, error pattern diagnosis
Nov 2020 – Aug 2022
Information Systems Management (Staff Sgt.)
Republic of Korea Air Force · IT infrastructure, secure networks
Expected Aug 2027
B.S. Artificial Intelligence
Kookmin University · Joint Major: Software & Future Mobility