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Everything you need to know about StackInterview and how to get the most out of your interview preparation.

What is StackInterview?

StackInterview is a free, structured interview preparation platform built specifically for full-stack developers. It offers 1,000+ curated technical questions across seven core technologies — JavaScript, React, Node.js, Next.js, TypeScript, MongoDB, SQL, and system design — along with expert explanations designed to build deep conceptual understanding, not surface memorisation. Unlike general coding platforms that focus purely on algorithmic puzzles, StackInterview covers the real-world full-stack engineering knowledge that senior roles require: rendering architecture, event-driven systems, database design, and distributed system thinking.

What technologies are covered?

The platform currently covers: JavaScript (closures, prototype chains, event loop, async/await, ES2024 features), React (hooks, rendering behaviour, server components, performance optimisation), Node.js (event-driven architecture, streams, cluster, Express middleware), Next.js (App Router, SSR vs SSG, server actions, data fetching patterns), TypeScript (generics, type narrowing, decorators, strict configurations), MongoDB (schema design, aggregation, indexes, transactions), SQL (joins, window functions, indexing, query optimisation), and System Design (load balancing, caching, microservices, message queues, CAP theorem).

Are these real interview questions?

Yes. Every question in StackInterview's bank has been curated from real technical hiring rounds at companies including Google, Meta, Stripe, Airbnb, Atlassian, and many mid-to-large technology companies. Questions are reviewed by engineers who have conducted interviews at these organisations to ensure they reflect genuine hiring standards.

What are Company Interview Tracks?

Company Interview Tracks simulate the interview format of specific technology companies. Instead of browsing random questions, you follow a structured sequence that mirrors a real interview: multiple rounds, increasing difficulty, a mix of technical domains. It is the closest simulation of a real interview you can get without scheduling one.

What are Interview Guides and Articles?

Interview Guides are long-form editorial articles covering interview strategy, technology deep-dives, and preparation frameworks. They are designed to give you the conceptual context you need to not just answer questions but understand and articulate the reasoning behind your answers — which is what separates good candidates from great ones.

Is StackInterview beginner friendly?

StackInterview is best suited for developers with some working experience in the technologies covered. Questions begin at a foundational level but quickly move toward the depth expected in senior engineering interviews. If you are an absolute beginner, we recommend building project experience first and returning when you are comfortable with the basics of React, Node.js, and JavaScript.

How often are questions updated?

The question bank is updated continuously. We monitor changes in hiring patterns, technology updates, and community feedback to keep questions current. Major technology updates — such as React 19 features or Node.js v22 APIs — are incorporated as they become relevant to interview rounds.

Can I filter questions by technology or difficulty?

Yes. You can filter questions by technology track, difficulty level (junior / mid / senior), and question type (conceptual / code-based / architecture). You can also browse the full Question Library or use the Surprise Challenge feature for a randomised cross-technology sequence.

Is StackInterview free?

Yes, completely. StackInterview is free for all developers with no account required to access questions. We believe quality interview preparation should be accessible to everyone, regardless of whether they can afford expensive bootcamps or subscription platforms.

How is StackInterview different from LeetCode?

LeetCode focuses primarily on algorithmic problem-solving (data structures, dynamic programming, graph algorithms). StackInterview focuses on full-stack engineering knowledge — React architecture, Node.js internals, database design, and system design — which is equally important for senior engineering roles but largely absent from algorithmic platforms. The two platforms complement each other: use LeetCode for algorithmic prep and StackInterview for everything else.

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