The step-by-step system design interview roadmap
45 minutes. A blank whiteboard. “Design a URL shortener for a billion users.”
Most engineers don’t fail this moment on knowledge. They fail on structure. The System Design Interview Roadmap gives you a proven method, taking you from comfortable, to familiar, to expert. You’ll walk into your next loop with a plan instead of guesswork.
Over 47,000 engineers already read it. It’s written for engineers preparing for L4–L6 system design interviews at FAANG-tier companies.
Everything you get to become system design ready
52 full-length walkthroughs. Real systems designed end to end, from ambiguous prompt to scaled architecture. Browse the walkthroughs →
Runnable source code. Every walkthrough comes with code you can run, so you understand how the design works in practice, not just on a whiteboard.
52 printable drill cards (PDF). Rehearse the core moves until they’re automatic: estimating load, picking partition keys, and finding where a design breaks first.
6 framework cheatsheets. One structure you can apply to every question, so your answers stay organized under pressure.
The Senior+ Playbook. For when a correct design isn’t enough and you need to answer like a senior engineer.
Get the 52 Questions Vault: drill cards and cheatsheets →
What you will master
We cover over 120 essential topics across 14 fundamental categories in a focused, progressive path:
Foundational architectures: client-server, microservices, and event-driven patterns.
Data layer: replication, sharding, partitioning, and distributed consensus.
Performance and reliability: caching strategies, load balancing, failover, and graceful degradation.
Real-world case studies: how industry giants handle extreme load, API versioning, and high availability.
Critical trade-offs: consistency, availability, latency, and cost, the decisions interviewers actually probe.
Our mission
System design interviews aren’t about memorization. They’re about structured thinking. We focus on the how and the why so you can:
Break down ambiguous problems into solvable components.
Communicate your technical decisions clearly.
Apply modern architecture patterns without over-engineering.
Who it’s for
Software engineers, backend engineers, SREs, DevOps engineers, and tech leads preparing for their next system design interview, or building systems that need to scale.
Ready to get system design ready?
Join 47,000+ engineers leveling up every week.
