Jee-eun Kang

Frontend Development — Bonus-Reconciliation Back Office

• Solo frontend developer on an enterprise Next.js 15 + React 19 back-office platform reconciling real-money bonus payouts (TypeScript strict mode, 14 business domains)
• Built a reusable component library (137 components, 87 custom hooks) powering consistent UI across all 14 domains, with 85%+ test coverage (Jest, React Testing Library)
• Designed global error boundary with menu-aware redirects, unified error pages, and 404 fallback
• Architected structured logging (Pino): client-side forwarding, Axios error capture, rate-limiting, Kubernetes-compatible Docker build
• Hardened the build gate — removed all build-error bypasses; zero-error TypeScript strict + ESLint pipeline
• Optimized the Docker image with Next.js standalone output

Platform & CI/CD — GitHub Actions, Docker, AKS

• Designed multi-stage GitHub Actions CI/CD: lint → typecheck → build → unit/component/E2E tests → security scan → ArgoCD deploy
• Built E2E testing infrastructure (Playwright, MSW, 4-worker parallel, visual regression, smoke-test stabilization)
• Cut Next.js Docker build time 8 min → 90s by fixing per-branch cache-tag collisions (published blog post)
• Cleaned and migrated 44 GitHub Actions secrets to config-as-code (least-privilege principle)
• Recovered blocked E2E smoke-test CI gate: diagnosed and fixed root causes across 4 PRs (environment variable inlining, flaky network timeouts, unmocked visual tests)
• Diagnosed and root-caused 3 production AKS issues: Spring Cloud Gateway JWT-validation outage (Cloudflare bot-fight block); Spring health-probe hang; container image-permission bug (uid mismatch)
• Verified a production VM→AKS domain cutover through live smoke testing across critical service paths

Backend — Spring Boot, Java, PostgreSQL, QueryDSL

• Implemented bonus-master-monthly domain (entity, CRUD service, audit, Flyway migration) using immutable-entity / mutable-domain pattern to protect read-only financial journal
• Built backend test suite (80%+ coverage) enforcing TDD: RED-GREEN-REFACTOR discipline
• Fixed Spring Cloud Gateway CORS issue affecting downstream service authentication
• Added projection query to eliminate N+1 access pattern in large result sets
• Contributed to authorization service RBAC backend: batch role fetch, bulk permission-to-resource mapping, cascade soft-deletes, Slf4j audit logging

Project Management — Partner Coordination

• Managed 6+ concurrent outsourcing projects end-to-end — requirements, storyboards, QA test cases, UAT, deployment — including payment-gateway, ERP, and compliance integrations
• Produced WBS, business-function decomposition, test reports, and contract/proposal deliverables

AI-Assisted Engineering

• Use multi-agent AI code review (reviewer, architect, security) as a pre-implementation design gate — validated the immutable-entity/mutable-domain design of the financial journal domain before build
• Apply AI-assisted TDD and code-generation workflows daily across frontend and backend work

Governmental Electronic-Textbook Project

• Developed 15 embedded pages for a governmental electronic-textbook project across web and mobile, using custom components, Shadow DOM, and SVG for highly interactive content (anime.js, sortable.js, jQuery)

EMS Dashboard & Topology Applications

• Built EMS admin pages and 30 widget-based components for dashboard and topology applications, with advanced interaction and data visualization (Highcharts.js, D3.js, Three.js, Canvas.js, Cytoscape.js, jQuery)

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