Summary

Summary

Section 2.2 (Backend) details how SUM+1’s Node.js/Express infrastructure facilitates:

• Core API Endpoints: Registration/login, feed interactions, trade operations, and more.

• Real-Time Interactions: Socket.io for sub-second updates and collaborative features (chats, signals).

• Robust Data Management: PostgreSQL for relational integrity, Redis for caching and ephemeral data.

• Scalability & Security: Horizontal scaling, rate limiting, and strong best practices (JWT, HTTPS, secrets management).

Through clear project structuring, separation of concerns (controllers vs. services), and automated testing, the SUM+1 backend sets the foundation for a secure, high-performance, and feature-rich social trading platform—capable of handling the demands of real-time crypto collaboration and rapid user growth.