This bundle is a carefully curated full backend interview preparation package covering JavaScript, TypeScript, Node.js, NestJS, and Database — designed for junior, mid-level, and senior developers.

It focuses on how interviewers expect you to understand language fundamentals, runtime internals, framework architecture, database design, and production-grade backend practices — not just build APIs.

What this bundle includes:

• 1225+ carefully curated backend interview questions across 5 topics

• JavaScript (205 questions) — closures, prototypes, event loop, async patterns, ES6+ features

• TypeScript (167 questions) — type system, generics, utility types, decorators, advanced inference

• Node.js (250+ questions) — event loop, streams, clustering, Express middleware, security

• NestJS (285+ questions) — modules, DI, guards, interceptors, microservices, testing

• Database (320+ questions) — SQL, NoSQL, PostgreSQL, MongoDB, DynamoDB, Firebase, schema design, query writing scenarios

• Production monitoring, performance optimisation, and deployment best practices across all topics

• Common mistakes and interview traps

Each PDF is structured from junior → mid → senior level, with clear explanations, practical code examples, and common interview traps highlighted.

Topics covered across the bundle:

• JavaScript fundamentals, closures, prototypes, and async patterns

• TypeScript type system, generics, mapped types, and conditional types

• Node.js event loop, libuv, streams, buffers, and module system

• Express.js middleware, routing, authentication, and error handling

• NestJS modules, dependency injection, guards, interceptors, and pipes

• NestJS microservices (TCP, Redis, RabbitMQ, Kafka, gRPC)

• SQL fundamentals (joins, aggregations, subqueries, window functions)

• NoSQL data modelling (MongoDB, DynamoDB, Firebase/Firestore)

• Database design scenarios (30+ whiteboard-style schema challenges)

• SQL query writing scenarios (35 hands-on challenges with optimal solutions)

• Clustering, worker threads, and horizontal scaling strategies

• Security, testing, monitoring, and production best practices

This bundle provides end-to-end coverage of the modern backend interview stack, exactly how it’s evaluated in real interviews.

Who this bundle is for:

• Backend developers at any level

• Full-stack engineers preparing for backend-focused interviews

• Frontend developers transitioning to backend or full-stack roles

• Engineers wanting comprehensive coverage of the modern backend stack

• Developers preparing for senior or lead backend positions

This is a PDF-only bundle, intended for personal use, and works best as a final interview preparation and last-mile revision guide, not a beginner course.