Building Scalable Web Applications with Next.js 15

# Building Scalable Web Applications with Next.js 15 At TrackStack, we chose Next.js 15 as our frontend framework. Here's why and how we built a scalable application that serves thousands of users. ## Why Next.js? ### Server Components Next.js 15's server components allow us to render on the server by default, improving performance and SEO. ### App Router The new App Router provides better code organization and automatic route handling. ### Performance Built-in optimizations like automatic image optimization and code splitting ensure fast page loads. ## Architecture Decisions ### Clean Architecture Pattern We follow a strict layered architecture: - Types layer (Prisma.GetPayload) - Services layer (API calls) - Hooks layer (React Query) - Components layer (UI) ### State Management We use React Query for server state and Context API for client state. This separation keeps our code clean and predictable. ### Database PostgreSQL with Prisma ORM gives us type-safe database access and excellent performance. ## Scaling Strategies ### Caching We implement multi-level caching: - React Query for client-side caching - Next.js route cache for SSR - Database query caching ### Code Splitting Every route is automatically code-split, ensuring users only download what they need. ### Image Optimization Next.js Image component automatically optimizes and serves images in modern formats. ## Performance Results Our efforts have paid off: - **<1s** initial page load - **<100ms** route transitions - **95+** Lighthouse score ## Best Practices 1. Use Server Components by default 2. Implement proper loading states 3. Optimize database queries 4. Use React Query for data fetching 5. Follow TypeScript strict mode ## Conclusion Next.js 15 provides an excellent foundation for building scalable web applications. Combined with the right architectural patterns, you can build applications that are both performant and maintainable. Want to learn more about our tech stack? Check out our open-source contributions!