Free & open source

InterviewRoadmap.dev

A free, open-source technical interview prep platform. Every technology track follows the same format: a navigable book, real interview questions, a glossary, and a practice simulator — no paid course, no sign-up, no ads.

Tracks:

The same format, every track

Like a real book

Chapters organized into progressive parts, covering what actually comes up in interviews.

Interview questions

Each question with a quick answer, a senior-level answer, an in-depth explanation, and common pitfalls.

Glossary

Essential terms with short and detailed definitions, linked back to the chapters where they appear.

Simulator

Practice at your own pace — open-ended mode (explain out loud) or multiple choice, everything saved only in your browser.

Choose your track

interviewroadmap.dev is a free, open-source technical interview prep platform, organized by technology.

KafkaAvailable

A practical, free guide to messaging, architecture, reprocessing, ordering, idempotency and distributed systems with Apache Kafka, for Java Backend developers preparing for technical interviews.

JavaUnavailable

Interview prep guide for Java Backend developers — concurrency, garbage collection, Streams, Spring Boot, testing and architecture practices for Mid-level, Senior and Tech Lead roles.

ElasticUnavailable

Interview prep guide for Elasticsearch — indexing, mapping, full-text search, aggregations, relevance scoring and search cluster scalability.

SQLUnavailable

Interview prep guide for SQL and relational databases — modeling, indexing, joins, transactions, isolation levels and query optimization.

AWSUnavailable

Interview prep guide for AWS — compute (EC2, Lambda), storage (S3), messaging (SQS/SNS), IAM and cloud system architecture.

GCPUnavailable

Interview prep guide for Google Cloud Platform — compute (Compute Engine, Cloud Run), storage, Pub/Sub, IAM and cloud system architecture.

This project is free and open source. Contributions are welcome.

View on GitHub