Jee-eun Kang

Jee-eun Kang

FE Engineer in Seoul

jee-eun-k
About

With over five years of experience in frontend development, I build and maintain enterprise-grade web applications with a focus on quality engineering — CI/CD pipelines, E2E testing, structured logging, and observability. Proficient in React, Next.js, and TypeScript, I have architected complex back-office systems, established automated testing infrastructure, and achieved zero-warning production builds. Beyond coding, I manage multi-project outsourcing engagements spanning the full project lifecycle from requirements to deployment. Currently pursuing a Computer Science degree at Korea National Open University to deepen my foundations in algorithms, operating systems, and networks.

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Work Experience
  • 2024 - Now
    Front End Developer PM International Korea

    Frontend Development — Bonus-Reconciliation Back Office Application

    • Solo frontend developer on an enterprise Next.js 15 + React 19 back-office system with TypeScript strict mode, serving 14 business domains
    • Architected CI/CD pipeline with GitHub Actions: multi-stage workflow (lint, type check, build, unit/component/E2E tests, security scan) with ArgoCD deployment, branch protection, and automatic retry for flaky tests
    • Built E2E testing infrastructure with Playwright and MSW (Mock Service Worker) — 4-worker parallel execution, visual regression testing, and smoke test stabilization
    • Implemented structured logging with Pino: client-side log forwarding, Axios error capture, rate limiting, and Docker standalone build compatibility for Kubernetes
    • Designed global error boundary with safe menu-aware redirects, unified error pages, and 404 fallback hardening
    • Achieved zero build warnings — removed all build-error bypasses, enforced ESLint strict mode, eliminated all any types across the codebase
    • Migrated package manager from npm to Bun and optimized Docker image with Next.js standalone output
    • Built reusable component library (100+ components, 50+ custom hooks) with 85%+ test coverage using Jest and React Testing Library

    Project Management — Partner Company Coordination

    • Managed 6+ concurrent outsourcing projects including homepage redesign, marketing event application, education program platform, pension program, business system application, and chatbot integration
    • Owned full project lifecycle: requirements gathering, storyboarding, development requests, QA test case definition, user acceptance testing, and deployment
    • Coordinated system integration across payment gateway, ERP, and compliance systems
    • Produced deliverables: WBS, business function decomposition, test result documentation, contracts, and proposals
  • 2024 - 2024
    Front End Developer Freelancing

    Electronic textbook page Development

    • Participated in the governmental electronic textbook pages project, developing 15 embedded pages for both web and mobile environments, utilizing Custom components, Shadow DOM, and SVG to embody high user interactive pages. (anime.js / sortable.js / jQuery)
  • 2020 - 2023
    Web Developer Brainz Company

    EMS Admin Pages and Widget-Based Components for Dashboard/Topology Applications Development

    • Developed interactive widget-based dashboards and topology Spring web applications, incorporating advanced user interaction features and visual effects. This project involved creating 30 distinct component functionalities and the associated admin page. The technologies used included various JS libraries (Highcharts.js, D3.js, Three.js, Canvas.js, Cytoscape.js, and jQuery.js)
Education
  • 2025 - Now
    Bachelor's, Computer Science Korea National Open University

    Coursework: Algorithms, Operating Systems, Computer Networks, Statistics & Probability