🛣️ Backend Interview Roadmap

A structured guide to help backend developers build solid Node.js skills and ace interviews.

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Node.js Fundamentals

Beginner

Event-driven architecture

Non-blocking I/O

Modules & npm

File system & Streams

Global objects

Built-in Node APIs

Express.js & Middleware

Intermediate

Routing & Middleware concepts

Request/Response lifecycle

Error handling & Logging

RESTful API design

Security (Helmet, CORS)

Databases & ORMs

Intermediate

SQL vs NoSQL

MongoDB, PostgreSQL basics

Mongoose / Prisma / Sequelize

Data modeling & schema design

Query optimization

Authentication & Authorization

Advanced

JWT, OAuth2, Sessions

Secure password handling (bcrypt)

Role-based access control

Passport.js / NextAuth.js

System Design & Scaling

Advanced

Load balancing & clustering

Caching (Redis, CDN)

Rate limiting & throttling

Queue systems (RabbitMQ, BullMQ)

Microservices architecture

Projects & Portfolio

Practical

Build real-world REST APIs

Document APIs with Swagger

Logging with Winston/Morgan

Dockerize your backend

Deploy on Render/Heroku/VPS

Mock Interviews & Practice

Polishing

System design round prep

Debugging questions

Discuss trade-offs in architecture

Mock sessions with peers or mentors

🚀 Keep coding, stay curious, and show off your backend mastery with awesome projects.