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Backend Software Engineer Interview Questions
Practice 9403 coding, system design and machine learning questions from 546 companies, sorted by role, topic and interview round. Every question has step-by-step hints, a code runner that supports 8 languages and an AI mentor; members also get the full solution walkthrough.
- 9403
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- 546
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- 11
- Topics
- 8
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Showing 1–3 of 3 results
- TikTokMediumBackend Software EngineerExplain a Difficult Project and Its Scaling Decisions
Practice explaining a difficult engineering project through ownership, technology choices, scaling constraints, and measured trade-offs. The model answer uses a clearly hypothetical ingestion service to show how to discuss alternatives, bottlenecks, rollout evidence, and lessons without exposing private project details.
Behavioral & LeadershipOnsite - TikTokMediumBackend Software EngineerImplement Hash Map Operations
Build a hash map behind a deterministic operation stream with insertion, replacement, lookup, removal, and missing-key behavior. The specification avoids built-in map storage and fixes return ordering and value bounds for a future portable console implementation.
Coding & AlgorithmsOnsite - TikTokMediumBackend Software EngineerProcess LRU Cache Operations
Implement an LRU cache through a deterministic stream of put and get operations, including updates, misses, and eviction order. The prompt defines an exact portable function contract and examples suitable for a later four-language console handoff.
Coding & AlgorithmsOnsite
TikTok