Infra · Full-stack Engineer

Sungjin Lee.

Relentlessly turning ideas into reality.

From a picture in my head to code, and code to solid systems.

View projects About me

/ Featured Projects

02

Alpha

Financial data · AI analysis platform

Collects KR/US equities, news, financials and macro indicators, then runs RAG-based AI analysis on top — split into microservices from ingestion to inference, all on Kubernetes.

TypeScript Kubernetes PostgreSQL Qdrant AI · RAG

Sorack

Infra topology · monitoring dashboard

Draws how nodes and services connect at a glance, and tracks status and metrics in real time — a control panel I built to operate the homelab by sight.

TypeScript React Hono PostgreSQL k8s

/ Tools & Apps

Rowsel

A mobile DB client — connect to your database and run queries right from your hand.

Flutter Rust

util

An all-in-one homelab utility toolkit in the browser — DNS, subnet, encoding, OTP, a password vault and more, in one place.

React TypeScript k8s

Random Toolkit

A mini utility app bundling random tools — roulette, ladder, dice, a probability calculator, and more.

React Native

/ Research & Projects

AI Traffic Prediction & Clustering

LG U+ Industry Project

AI traffic prediction & clustering for energy-efficient networks.

AI/MLTime-SeriesClustering5G

O-RAN SC · AIMLFW

Open-source · 2024

Contributions to the O-RAN SC AI/ML Framework.

O-RANAI/MLOpen-source

5G Green AI

SKT AI Fellowship · Excellence Award

Traffic-forecast-driven base-station energy saving.

5GAI/MLEnergy

Review-based Recommender

AWS x KHU · 2023

Natural-language product search over reviews & specs.

ElasticsearchMLAWS

BLE Motor Interference

JCCI · 2024

BLE performance under motor/inverter environments.

BLESDRRF