LinkedIn Software Engineer Interview Questions

I would reassess the scope, identify what is truly essential, and adjust the design to protect the timeline. Then I would communicate the trade-offs clearly so everyone understands the impact. Good engineers adapt without letting the system become messy.

I would treat notification generation, routing, and delivery as separate steps so each part can scale and fail independently. Then I would think about user preferences, retries, ordering, and deduplication. A good design keeps the experience reliable and controlled.

I would start with the simplest solution that clearly meets the requirement, then optimize if scale or performance demands it. Premature complexity can make the system harder to maintain without real benefit. The best answer shows good judgment, not just cleverness.

I would use recursion or an explicit stack depending on the depth and the expected input size. Then I would make sure the output preserves the correct order. The main point is to choose an approach that stays readable and safe for the given problem.

I would cover the core behavior with unit and integration tests, then validate the main user flows in an environment close to production. I would also check edge cases and failure paths so the team is not surprised after release. Good testing gives confidence without slowing delivery too much.