Use the Quick Reference Cheat Sheet to prepare fast and land that job, then go deeper with the full book bundle.
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If you're short on time, the Quick Reference Cheat Sheet is your fastest way to prep. It includes preparation checklists, high-signal interview questions, example answers, prototyping and diagram tips — all designed to help you stand out.
It’s included with the full book package; your complete system design reference, with 500+ pages of deeper patterns, strategies, and architecture thinking for real-world apps.
Want to go deeper? Learn at your own pace.
Used by devs at Facebook, NYT, and companies around the world.
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❝It has helped me crack some of the most difficult System Design interviews.
It's even helping in my current role where I'm heading the mobile division.❞
— @_thatabishek
Most system design advice is backend-focused, which is not how mobile teams work. I built this guide to help engineers cut through complexity and communicate clearly under pressure.
You know how to build great apps. But in interviews? Explaining architecture, tradeoffs, and flows under pressure is a different skill.
You’re expected to:
Most developers aren’t used to articulating high-level architecture decisions. And for some, the challenge runs deeper, they’ve never had to make those decisions at a deep level. That’s why design interviews are tough, and why targeted prep can make a huge difference.
Interviewers want to see how you think. They’re looking for clarity, structure, and decision-making under pressure.
You’ll stand out if you can:
Whether you're targeting a senior role or just want to stop blanking during system questions, this material gives you a clear structure and repeatable approach.
These are real comments from developers who’ve read Mobile System Design — whether for learning, interviews, or improving architecture on the job.
I have a system design interview coming up for iOS in about 3 weeks. Anyone available to help me practice? I’ve been reading this https://t.co/hbUETCKrrj and it’s been very helpful :)
— Taylor Simpson (@phzytaylor) January 22, 2024
Exploring @tjeerdintveen's https://t.co/byhJdiTZiS for the second time as it updates. It's a valuable resource for mobile engineers at any level, significantly aiding my project work. Even received direct help from Tjeerd on an occasion! #MobileEngineering #iOS
— Edvinas Gestautas (@edvinasges) February 2, 2024
Everything you need to prep fast and grow long-term.
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