Microsoft Backend Engineer Interview Questions

3700+ verified questions, indexed by team and level. Real questions submitted by candidates who completed Microsoft loops in the last 24 months.

About the Microsoft Backend Engineer hiring loop

Microsoft uses the SE → Senior SE → Principal → Partner ladder. System design assumes Azure-native primitives (Cosmos DB, Service Fabric, AKS, Front Door). Behavioural rounds reward Growth Mindset framing over STAR. Questions indexed by org (Azure, M365, Xbox, GitHub, LinkedIn, Bing).

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 Microsoft 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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