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System Design Masterclass · Cloud Infrastructure
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Every web application needs the same backend pieces: user authentication, a database, file storage, push notifications, and maybe real-time subscriptions. These components are well-understood, mostly commoditized, and boring to build from scratch.
Yet teams spend weeks building authentication systems. Months building real-time infrastructure. Entire sprints configuring file upload pipelines. This is undifferentiated work. It does not make your product unique, but it consumes engineering time that could go toward features that do.
BaaS (Backend as a Service) provides these common backend components as managed, API-accessible services. Firebase gave mobile developers a complete backend in minutes. Supabase does the same with PostgreSQL and open-source tools. Appwrite offers a self-hostable alternative. Instead of building backend infrastructure, you call APIs and configure dashboards.
The trade-off is familiar by now: less control, less customization, but dramatically faster development. For MVPs, side projects, and applications where the backend is not the differentiator, BaaS is a force multiplier.
Firebase, Supabase, and Appwrite take fundamentally different approaches to the same problem: