Interview Handbook

System design + domain interview handbook for ALL engineers and PMs. From ex-FAANG.

Role-based Guides

System design, distributed systems, APIs, databases, and microservices architecture.

ML system design, model selection, training pipelines, evaluation, and deployment.

Frontend architecture, performance optimization, state management, and UI systems.

iOS and Android architecture, offline-first design, and mobile-specific challenges.

A/B testing, experimentation, metrics design, and statistical analysis.

Data pipelines, ETL/ELT, streaming vs batch, and data warehousing.

Product sense, metrics frameworks, roadmapping, and technical PM skills.

Scalability, reliability, databases, caching, load balancing, and distributed systems.

Table of Contents

See how all interview topics connect, from fundamentals to advanced design questions. Track your progress through each discipline.

Practice hundreds of real coding and system design interview questions from 40+ top tech companies at HackTheRounds.

Ready to Start?

Pick your discipline and start preparing for your next interview. All content is free and designed to help you succeed.