ML.
/

Software Engineer @ UJET · ex-Founder/CTO · Seoul, open to global roles

MARTIAN
LEE.

I move fast with AI — and keep the decisions that matter human.

↓ View projectsPostsCV ↗GitHub ↗
01 — ProjectsAll projects →
Mo

More Munch

Web Service

A lunch-recommendation service for office workers. It auto-collects nearby restaurants (discoverable via the OpenClaw skill-optimized API) and suggests a fresh lunch every day based on your visit history and ratings.

CheerCat

CheerCat

Mobile App

A daily journaling app that builds the habit of praising yourself every day — a small ritual for a positive mindset.

Earth Invaders

Earth Invaders

Arcade Game

A Phaser3 arcade shooter. Fend off the aliens invading Earth, classic arcade style.

Fish Tank Simulator

Fish Tank Simulator

Idle Game

A pixel-art idle productivity tool that blends a Pomodoro timer with an aquarium sim. Complete focus sessions to earn fish eggs, collect 12+ species, and grow your own tank.

02 — Recent postsAll posts →

I take large codebases apart and write down how they actually work.

2026년 7월 25일 · 28 min read · bitchat / bluetooth-mesh

bitchat Architecture: How Do You Deliver a Message With No Internet and No Radio Range?

bitchat is a P2P messenger with no accounts and no servers. Nearby devices form a BLE mesh; distant peers are reached over Nostr. The center of this piece is the four-layer store-and-forward stack that answers "the recipient is not here right now" — a sealed outbox, courier envelopes addressed by nothing but an HMAC tag plus spray-and-wait, GCS-filter public history sync, and Nostr mailboxes — traced through the code.

2026년 7월 24일 · 18 min read · hallmark / prompt-engineering

Hallmark Architecture: How Do You Stop Designs From Looking 'AI-Generated' — With a Prompt?

Hallmark is Together AI’s anti-AI-slop design skill. It ships almost no executable code — its entire intelligence lives in 106 markdown files. This piece dissects the SKILL.md router and its progressive context loading, the narrowing decision pipeline, and — at its center — the 58 slop-test gates, contrasting it with skill-injecting projects like Superpowers and SkillSpector.

Llama 3 (2024) Paper Notes2026년 7월 24일
Llama 2 (2023) Paper Notes2026년 7월 13일
Analyzing Floci: What Does It Take to Fit 68 AWS Services Into One Container?2026년 7월 10일
03 — ExperienceCV ↗

UJET — Software Engineer 2

UJET is AI-Powered Cloud Contact Center Platform for Premium CX · Rails · GCP · Node.js · TypeScript · Kubernetes

2024 - Present

Stepping — Founder / CTO

Stepping helps companies and brands navigate complex carbon-neutral processes and climate action projects to build a sustainable future. · Next.js · React · Nest.js · PostgreSQL · AWS · 0to1

2021 - 2023

Miso — Frontend Developer

South Korea's leading home services platform. Responsible for client app maintenance and back-office development to improve CX operations. · React · React Native · Redux · TypeScript

2020 - 2021
Open to senior / staff engineering roles — globally.
Email ↗GitHub ↗LinkedIn ↗