Computer Science & Engineering Undergraduate (Backend Developer)

Junyoung Yang (양준영)

I am a senior in the School of Computer Science and Engineering at Pusan National University. I have worked mainly on Spring Boot-based backend projects, with a focus on how services behave and stay maintainable in real operating environments.

Recently, I have been developing and maintaining Code Place, handling operational issues in a k3s environment, and building an AI teaching assistant using vLLM. I have also built and deployed services with Redis, AWS, and Docker, including message processing and real-time state synchronization in multi-instance environments.

Current: Student Researcher at PNU AI Convergence Education Institute
Education: Pusan National University CSE, expected Feb 2027
Focus: Backend architecture, Spring Boot, Redis, operations, real-time services
Record: 9 awards, Kakao Tech Campus BE Tech Leader, 2+ years teaching algorithms

Experience

PNU AI Convergence Education Institute

Mar 2026 - Present · Student Researcher

Developing and maintaining Code Place, Pusan National University's algorithm practice platform with around 800 users, while handling operational issues in a multi-node k3s environment and building a local LLM-based AI teaching assistant.

Kakao Tech Campus, 3rd Cohort

Apr 2025 - Nov 2025 · Trainee, Backend Tech Leader

Studied Spring Boot, JPA, and system design with code reviews from Kakao developers, then led backend development and architecture as the backend tech leader for the final project.

IM4U Gifted Education Center

Feb 2024 - Jan 2026 · Algorithm and KOI Prep Instructor

Taught data structures and algorithms to middle and high school students preparing for the Korea Olympiad in Informatics, explaining difficult concepts and debugging student code together.

APPTIVE (Campus IT Startup Club)

Mar 2025 - Feb 2026 · Backend Mentor

Mentored new members in backend development and led weekly study sessions. Also won 2nd place in a campus hackathon with club members.

AID (Campus AI Academic Club)

Sep 2024 - Aug 2025 · Computer Vision Study Lead

Led a computer vision study group and participated in ideathons and external individual CV competitions, earning awards along the way.

Selected Projects

All Projects

GRIT

Spring Boot · LiveKit · WebRTC

A real-time study platform where the server uses LiveKit SendData to deliver Pomodoro timer sync and emoji reaction events.

UniSchedule

Spring Boot · Redis Pub/Sub · AWS ECS/Fargate

A university schedule manager where Redis Pub/Sub resolved chat message loss in multi-instance deployment.

OnGi

Flutter · Spring Boot · GCP Cloud Run

A family health and communication app with push notifications and deployment automation.

DocDoc

Node.js · LangChain · Pinecone

A RAG-based assistant for exploring medical paper insights with real-time answer streaming.

Tech Stack

Back-end

Java
Spring Boot
Spring Data JPA
Spring Security
JWT
OAuth 2.0

Database & Caching

MySQL
PostgreSQL
Redis Pub/Sub
LiveKit SendData

Infrastructure

AWS EC2
AWS ECS/Fargate
S3
CloudFront
Docker Compose
Nginx
Kubernetes(k3s)

Observability

Prometheus
Grafana
Loki
Tempo

Testing & Tools

JMeter
Git/GitHub
Swagger/OpenAPI
GitHub Actions

Additional

Node.js(Express)
JavaScript
TypeScript
GCP Cloud Run
Pinecone
FAISS
vLLM
Android(Java)

Awards

Kakao Tech Campus Final Project

Nov 2025 · Team

Excellence Award / 2nd Place

6th PNU SW Hackathon

Aug 2025 · Team

Grand Prize / Dean’s Award

3rd Ajou Deep Learning Challenge

Nov 2024 · Individual

1st Place / President’s Award

2024 PNU CSE Ideathon

Nov 2024 · Team

3rd Place / Dean’s Award

4th PNU Coding Challenge

Nov 2024 · Individual

Encouragement Award / Director’s Award

2020 Busan Coding Competition

Sep 2020 · Individual

Silver Award / Director’s Award

3rd Busan SW Education Hackathon for Secondary School Students

Oct 2019 · Team

Grand Prize / Director’s Award

5th POSTECH Infinite Imagination Challenge

Jul 2019 · Team

2nd Place / KT Sustainability Award

Woosong University National SW Club Competition