General Architecture Overview and Implementation for Scalable Backend Systems

The author, a senior architect, explains why startups should adopt a more adaptable architecture early on, moving beyond simple LAMP or SSH three‑tier setups that become hard to maintain as business complexity grows.

The proposed general architecture still uses the three‑tier concept but evolves it into three distinct layers: a gateway layer (the topmost entry point), a business layer (core domain logic), and a foundation layer (infrastructure and technical components).

The gateway layer abstracts protocol handling; HTTP requests are processed via Tomcat and Spring MVC with controllers acting as unified entry points that parse parameters, invoke services, and format responses, while TCP requests are handled using Netty or Dubbo, allowing the underlying business logic to remain unaware of the transport mechanism.

The business layer is organized into business services, business processes, and business components. Services expose domain‑specific interfaces with clear request/response models; processes translate business rules into executable steps; components are reusable code fragments categorized as parameter assembly, rule evaluation, or action execution, and can be combined into higher‑level capabilities.

The foundation layer focuses on interface definitions and technical components. It covers data storage options (relational databases, NoSQL, file systems), caching strategies (local memory, Memcached, Redis), asynchronous mechanisms (messaging and scheduled tasks), transaction management (Spring‑TX), and locking techniques (optimistic and pessimistic locks), all designed to be accessed via business‑oriented interfaces rather than low‑level implementations.

Finally, the author invites readers to discuss and share viewpoints, offering community groups and additional resources for deeper learning.