Frontend React 19, TanStack Query, Tailwind CSS, Vite, Chrome Extensions (Manifest V3) Backend Node.js, Bun, ElysiaJS, Express, REST APIs, Drizzle ORM, Zod, MCP Databases PostgreSQL, MariaDB, MongoDB DevOps Docker, GitHub Actions (CI/CD), Nginx, Playwright, ESLint, Prettier Testing Bun Test, HappyDOM, Jest, Playwright (E2E)