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Achievement: Pull Sharkx3Achievement: YOLOAchievement: QuickdrawAchievement: Arctic Code Vault Contributor

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JungTag/README.md

Hi there πŸ‘‹ I'm Yeongtaek Yun (μœ€μ˜νƒ)

Introduction

  • Backend Developer | Based on Kotlin & Java
  • Experienced in building scalable and high-performance backend systems
  • Passionate about system architecture, caching strategies, and distributed systems

Tech Stack

  • Backend: Kotlin, Java, Spring MVC, Spring Webflux
  • Database: MySQL, Oracle, MSSQL, Redis
  • Infra: AWS, k8s, Kafka, ElasticSearch, Docker
  • Testing & Performance: JUnit5, Kotest, JMeter, nGrinder

Experience

  • Naver (2025.03 – Present)
    • Developing and maintaining Naver Shopping order history system
  • KakaoPay Insurance (2024.06 – 2025.03)
    • Built insurance gift system
    • Designed deposit-based insurance payment flow
    • Automated failure recovery for payout transactions
  • Gmarket (2022.01 – 2024.06)
    • Developed high-traffic coupon APIs (100M+ daily calls)
    • Designed and optimized caching strategies using Redis + Kafka
    • Improved API performance and scalability
    • Built Gifting API/WebView, Funding Discount system, and improved legacy Admin

Pinned Loading

  1. Dev-Event Dev-Event Public

    Forked from brave-people/Dev-Event

    πŸŽ‰πŸŽˆ 개발자 {μ›¨λΉ„λ‚˜, 컨퍼런슀, 해컀톀} 행사λ₯Ό μ•Œλ €λ“œλ¦½λ‹ˆλ‹€. [with 남솑리 μ‚Όλ²ˆμ§€]

    1

  2. dev-tips dev-tips Public

    Forked from HomoEfficio/dev-tips

    κ°œλ°œν•˜λ‹€ 마주쳀던 μž‘μ€ λ¬Έμ œλ“€κ³Ό ν•΄κ²° 방법 정리

    HTML

  3. spring-guide spring-guide Public

    Forked from cheese10yun/spring-guide

    :octocat: Spring μ‹€μ „ κ°€μ΄λ“œ

    Java 1

  4. spring-jpa-best-practices spring-jpa-best-practices Public

    Forked from cheese10yun/spring-jpa-best-practices

    :octocat: spring-jpa best practices

    Java