“As a MERN Stack Developer, I mainly use design patterns that help in scalability, code reusability, and maintainability.
On the frontend using React, I commonly use Component Pattern, Custom Hook Pattern, Context Provider Pattern, and sometimes HOC Pattern for reusable logic.
On the backend with Node.js and Express, I mostly follow MVC Architecture, Middleware Pattern, Service Layer Pattern, and Repository Pattern to separate business logic, API handling, and database operations properly.
For database connection management, I use Singleton Pattern to maintain a single MongoDB connection instance.
In larger or scalable systems, I also work with Microservices concepts like API Gateway, Pub/Sub, and Event-Driven Architecture.”