LinkedIn Backend Engineer Interview Questions

1200+ verified questions, indexed by team and level. Real questions submitted by candidates who completed LinkedIn loops in the last 24 months.

About the LinkedIn Backend Engineer hiring loop

LinkedIn technical rounds blend FAANG-grade coding with feed-ranking and social-graph system design. As a Microsoft subsidiary the rubric inherits Growth Mindset framing for behavioural. Coding rounds run on a LinkedIn-custom editor; sub-second hint latency is critical.

Backend rounds score on API design quality, database-tier reasoning, scalability anchoring, and operational maturity (observability + reliability). Trade-off articulation differentiates Senior from Mid.

Topics covered in LinkedIn Backend Engineer interviews

  • 01API design (REST, GraphQL, gRPC, idempotency, versioning, pagination)
  • 02Database design (relational vs document vs wide-column, indexing, query plans)
  • 03Caching strategies (read-through, write-through, write-back, invalidation)
  • 04Concurrency + async (threads, event loops, queues, distributed locks)
  • 05Authentication + authorization (OAuth, JWT, RBAC, ABAC, session management)
  • 06Observability (logs, metrics, traces, SLOs, error budgets)

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