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Beyond feature implementation, I focus on reliable service operations and scalable system design.

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Yungee Jung Profile

Yungee Jung

Problems are not just solved by making them work; I value understanding the root cause and finding a better long-term approach.
I focus on backend development, especially data processing and performance improvement, while also learning deployment and infrastructure to understand how services operate end-to-end.
I continue broadening my experience across necessary areas to build more reliable services with a stronger operational mindset.

Hongik University, Dept. of Computer Engineering
UMC 4th FE Developer (2023.03 – 2023.07)
LIKE LION Hongik Univ. 11th FE Developer (2023.03 – 2023.12)
CEOS 22nd Developer (2025.09 – 2026.01)

jungyungee0610@gmail.com

GitHub

Tech Stack

Technologies and tools I use most in development.

Backend

Java Spring Boot JPA / Hibernate QueryDSL

Database

MySQL

Infra & DevOps

AWS Docker Kubernetes Helm Argo CD GitHub Actions Nginx

Frontend

React TypeScript Next.js TanStack Query Zustand

Projects

Projects through which I gained practical experience and learned how to build better services.

TRIPFEED login screen

TRIPFEED

Backend · InfraGitHub

A travel community for sharing information and reviews and finding companions with matching schedules, featuring a photo-first feed for travel reviews. I designed and built the data model and ERD, backend API, and AWS and Kubernetes infrastructure, focusing on data consistency, query performance, and operations automation.

Spring BootQueryDSLKubernetes · Argo CD
01

View-count consistency

Designed duplicate-view rules for members and visitors and combined conditional view-history writes with atomic updates to prevent lost counts under concurrent requests.

02

Query performance

Diagnosed an N+1 issue in the post feed and replaced repeated queries with a single JOIN using QueryDSL Fetch Join.

03

Delivery and operations

Evolved an EC2-based setup through Docker and GitHub Actions into a GitOps workflow with Kubernetes, Helm, and Argo CD.

Moandi – Designer–Model Matching Platform

Frontend

A matching platform connecting designers and models through recruitment posts, reservations, and chat. I implemented signup and authentication, the model home, portfolios, and real-time chat while managing role-based user flows, API integration, and responsive interfaces.

Next.js · TypeScriptReact Query
Moandi – Designer–Model Matching Platform

Hongik DevTalk Seminar Website

Frontend Lead

The official platform for Hongik University DevTalk seminar registration and management. As Frontend Lead, I designed the design system, layout, and routing structure while coordinating the team’s implementation direction. I also built the admin dashboard, account and login flows, and the user seminar application experience.

React · TypeScript · Tailwind CSS
Hongik DevTalk Seminar Website

PloGo – Plogging Course Recommendation App

Mobile

A Flutter-based graduation project for recommending and logging plogging courses at eco-tourism sites in Korea. I developed core mobile features including map-based activity logs, regional search, photo uploads, and Kakao login.

Flutter · Dart · Riverpod
PloGo – Plogging Course Recommendation App

© 2025 Yungee Jung. All rights reserved.