Infosys Backend Engineer Interview Questions

4200+ verified questions, indexed by team and level. Real questions submitted by candidates who completed Infosys loops in the last 24 months.

About the Infosys Backend Engineer hiring loop

Infosys hires through three tracks — Infosys SP (System Engineer, ₹3.6 LPA), DSE (Digital Specialist Engineer, ₹6.5 LPA), and Power Programmer (₹9 LPA). HackerRank-style coding (Java / Python / C++) plus 90-min Aptitude (Quant + Logical + Verbal + Pseudocode).

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 Infosys 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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