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Mobile System Design
Android interview prep. 13 chapters, 8 labs. Free. │
Everything you need to clear Staff and Principal Android interviews, free. 13 deep-dive chapters, 31 real post-mortems (Snapchat, Instagram, Notion), 25 requirements-gathering problems, 26 behavioral scenarios, code review lab, mindset challenges, and spaced repetition.
Top comment
Hey Product Hunt 👋 I'm Sahitya, an Engineer. Over the last few years of interviewing at FAANG and coaching friends through Staff+ loops, I kept hitting the same problem: the good mobile system design content was either locked behind $500 courses or scattered across a dozen blog posts. So I built Mobile System Design to be the resource I wish I'd had — completely free, no signup, no paywall: • 13 deep-dive chapters (Networking → Compose → Coroutines → Offline-first) • 31 real post-mortems (Autopsy Lab) — diagnose actual Android failures from Snapchat, Instagram, Notion before reading the verdict • 25 Requirements Lab problems with a scripted interviewer that responds to your clarifying questions • 26 FAANG behavioral scenarios with IC calibration • A Code Review Lab for spotting antipatterns in broken Kotlin • Mindset Lab — see how Senior / Staff / Principal engineers think through the same scenario • Spaced repetition + a 3-min blind-spot diagnostic Everything works offline once the page loads. There's also an audio mode with 85 narrated tracks if you'd rather study on a walk. Happy to answer any questions about the interview loops I've been through, the content inside, or how I built it (Next.js 16, multi-provider AI fallback for the requirements lab). Feedback very welcome!
About Mobile System Design on Product Hunt
“Android interview prep. 13 chapters, 8 labs. Free. │”
Mobile System Design was submitted on Product Hunt and earned 0 upvotes and 1 comments, placing #37 on the daily leaderboard. Everything you need to clear Staff and Principal Android interviews, free. 13 deep-dive chapters, 31 real post-mortems (Snapchat, Instagram, Notion), 25 requirements-gathering problems, 26 behavioral scenarios, code review lab, mindset challenges, and spaced repetition.
On the analytics side, Mobile System Design competes within Education, Tech and Career — topics that collectively have 703k followers on Product Hunt. The dashboard above tracks how Mobile System Design performed against the three products that launched closest to it on the same day.
Who hunted Mobile System Design?
Mobile System Design was hunted by Sahitya Pasnoor. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
For a complete overview of Mobile System Design including community comment highlights and product details, visit the product overview.