https://www.jee-eun-k.dev/writing Frontend engineering insights and thoughts en-us https://www.jee-eun-k.dev/writing/post_20260427 Mon, 27 Apr 2026 00:00:00 GMT How I reduced a Next.js Docker build from 5-8 minutes to under 2 minutes on GitHub Actions by fixing a single cache tag, removing dead config, and separating build from push. https://www.jee-eun-k.dev/writing/post_20260420 Mon, 20 Apr 2026 00:00:00 GMT Implementation retrospective of migrating from keycloak-js to Auth.js v5. Covers what the blueprint predicted correctly, where reality diverged, and the planning lesson: external research is not enough for migration epics. https://www.jee-eun-k.dev/writing/post_20260410 Fri, 10 Apr 2026 00:00:00 GMT A phased strategy for adding test automation to a legacy Next.js codebase: from measuring the baseline, through blocking PR checks, to E2E smoke tests and removing build bypasses. Real configs, real code, real tradeoffs. https://www.jee-eun-k.dev/writing/post_20260409 Thu, 09 Apr 2026 00:00:00 GMT How we built a complete logging pipeline that captures browser errors, API failures, and server events through a single pino-based JSON pipeline — with batching, PII redaction, circuit breakers, and rate limiting. https://www.jee-eun-k.dev/writing/post_20260408 Wed, 08 Apr 2026 00:00:00 GMT A complete migration blueprint from client-side keycloak-js to server-side Auth.js v5 with PKCE, httpOnly cookies, and hybrid token pattern. Covers architecture, security tradeoffs, PKCE deep-dive, and multi-pod considerations. https://www.jee-eun-k.dev/writing/post_20260406 Mon, 06 Apr 2026 00:00:00 GMT How structured logging with pino silently failed in a Next.js standalone Docker build on AKS, and the three-PR debugging journey to fix it — from devDependencies to worker-thread transport tracing. https://www.jee-eun-k.dev/writing/post_20260401 Wed, 01 Apr 2026 00:00:00 GMT How a solo frontend engineer built a sprint planning and backlog management system using AI multi-agent workflows, GitHub Issues, and structured story specs — for a team of one. https://www.jee-eun-k.dev/writing/post_20260330 Mon, 30 Mar 2026 00:00:00 GMT A personal retrospective on building a 4-stage test automation pipeline for a Next.js financial platform, fixing 313 type errors, and removing all build bypasses — as a solo developer. https://www.jee-eun-k.dev/writing/post_20250801_my-grand-adventure-t Fri, 01 Aug 2025 00:00:00 GMT A solo frontend engineer's journey implementing SSO with Keycloak and PKCE on client-side rendered Next.js projects, battling infinite loops, memory-hungry ghost sessions, and achieving victory https://www.jee-eun-k.dev/writing/post_20250801_nextjs-15-react-19-u Fri, 01 Aug 2025 00:00:00 GMT Comprehensive guide to upgrading from Next.js 14 to 15 with React 19, including breaking changes, migration strategies, and real-world implementation experience https://www.jee-eun-k.dev/writing/post_20250723 Wed, 23 Jul 2025 00:00:00 GMT Learn how to handle React Query caching with server-side pagination and avoid common pitfalls https://www.jee-eun-k.dev/writing/post_20250714 Mon, 14 Jul 2025 00:00:00 GMT A follow-up on our authentication system adoption, this post details how we built a robust, centralized route validation system in Next.js to prevent invalid page renders. https://www.jee-eun-k.dev/writing/post_20250713 Sun, 13 Jul 2025 00:00:00 GMT Sharing lessons learned while transitioning to Keycloak SSO for an MSA architecture. https://www.jee-eun-k.dev/writing/post_20250415 Mon, 21 Apr 2025 00:00:00 GMT Learn why mixing Material-UI and shadcn/ui is problematic and what alternatives exist https://www.jee-eun-k.dev/writing/post_20250401 Tue, 01 Apr 2025 00:00:00 GMT Learn how to preserve URL parameters during navigation in Next.js without using external libraries https://www.jee-eun-k.dev/writing/post_20250301 Sat, 01 Mar 2025 00:00:00 GMT How I solved a tricky production 404 error caused by Nginx configuration