Kim Hyun

Flutter · Spring Boot · Product Engineering

A Mobile and Backend Developer
Who Ships Real Products

I work across app screens, admin tools, API servers, and release automation as one product flow. I move fast, but I structure systems for real operation.

2025.05 - 2025.09

출카

A multilingual used-car export platform. Built the Flutter app, Spring Boot API, and admin web together, including auction and reverse-auction flows.

  • Flutter
  • Java
  • Spring Boot
  • IAP

2025.07 - 2025.08

트라이프리

A B2B/B2C web service connecting educational experience bookings and settlement flows. Designed the operating flow and reporting structure.

  • Spring Boot
  • Thymeleaf
  • MySQL

2025.08 - Present

정이조 학원관리

Built an academy operations admin that manages franchises, textbooks, payments, and student data in one place.

  • Admin
  • JPA
  • REST API

Newgenesis

Backend & Flutter Developer · 2025.05.08 - Present

  • Designed and shipped production services with Flutter and Spring Boot
  • Implemented multilingual flows, authentication, and Apple in-app purchase validation
  • Operated a Thymeleaf admin web and API server together

ICTUS

Flutter Developer · 2021.11.08 - 2024.09.06

  • Migrated a legacy app to an MVVM architecture for better maintainability
  • Ran release pipelines with GitHub Actions, Fastlane, Jenkins, and Firebase
  • Built experience across payments, maps, social login, and cloud media integrations
FlutterDartJavaSpring BootThymeleafJPAMySQLREST APIGitHub ActionsFastlaneJenkinsFirebaseSupabase

Safe House

An app that turns real-estate contract checklists into action

Safe House comparison screenView Safe House

Car Finder

A checklist app for inspecting and comparing used cars before purchase

Car Finder vehicle list screenView Car Finder

StarBook

A guide app for opening StarCraft strategy references fast

StarBook home screenView StarBook

The Size

A personal size manager that keeps clothing and shoe data in one place

The Size closet screenView The Size
kimhyun15372@gmail.com