How I designed authentication, access control, protected routes, token refresh, and server-side authorization for a Next.js application.

A look at the architecture behind a modern eCommerce system, including product management, orders, payments, logistics, APIs, and customer notifications.

Practical approaches to structuring Node.js APIs with authentication, validation, database access, error handling, and integrations.

Techniques I use to improve loading performance, rendering strategy, image optimization, caching, and Core Web Vitals in Next.js applications.