yoe: 7\n\nRound 1 (iOS + Coding challenge):\n* [20min] A lot of questions related to concurrency: threads, GCD, deadlocks, race conditions, etc.\n* [20min] For a graph coding challenge. Similar to https://leetcode.com/problems/number-of-islands\n\nRound 2 (iOS + Coding challenge):\n* [20min] Swift and some Objective-C runtime, reference vs value semantics, copy-on-write, dynamic vs static dispatch, memory management. \n* [20min] Implement merge sort from scratch. Interviewer wanted to see the iterative approach\n\nRound 3 (System Design):\n* [15min] 3 behavioral questions about handling failure, influencing people and technical leadership\n* [30min] System design discussion about one of my past projects (iOS + backend) \n\nRound 4 (System Design):\n* [15min] Behavioral, same as previous interview. Is best to not repeat stories. \n* [30min] Design Whatsapp (realtime chat, group chat, add contact, support images and stickers). \n\n1 week after round 4, HR scheduled a meeting to give an offer

yoe: 7\n\nRound 1 (iOS + Coding challenge):\n [20min] A lot of questions related to concurrency: threads, GCD, deadlocks, race conditions, etc.\n [20min] For a 