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Airbnb
Hard14Challenges
2War Rooms
~36hPrep Time
2/14Completed
Strong focus on craft and UX intuition. System Design with empathy.
14% complete
Interview rounds:Phone ScreenCoding ×2System DesignCross-FunctionalHiring Manager
DSA2
PR Review4
SQL Injection via Template LiteralsSecurity scan flagged this PR. A junior dev added audit logging to the login route — but…
Junior~10 min
Insecure Direct Object Reference (IDOR)A security researcher privately reported they can download any user's invoice by changing …
Junior~12 min
Missing Idempotency in Payment WebhooksThe customer support team is flooded with tickets. Users are complaining they are being do…
Mid~15 min
Stale Closure in useCallbackA dev is using a debounced "Auto-Save" feature in a text editor. Users report that when th…
Mid~12 min
War Room2
AWS S3 Runaway rm Command (Region-Wide Outage)A junior engineer ran a maintenance script with a typo in the bucket name parameter. Inste…
Mid~20 min
Dual-Write Inconsistency During Database MigrationYou're migrating from MySQL to Cassandra. During the dual-write phase, writes are sent to …
Senior~35 min
System Design1
Tech Debt Tribunal3
Decouple Tight Database DependenciesInvoiceService instantiates a raw MySQL connection inside its methods. Unit tests require …
Mid~30 min
Copy-Paste Code → Shared UtilityThe same price formatting function (currency symbol, decimal places, locale) is copy-paste…
Junior~20 min
Missing Loading and Error States in ReactA listings page renders nothing while fetching and silently shows an empty list on error. …
Junior~20 min