Role-specific practice
Backend Developer Mock Interview
Prepare for backend interviews covering APIs, databases, concurrency, distributed systems, security, and operational reliability.
Best for: Backend developers with 1-5 years of experience
Example spoken questions
- 01Design an idempotent API for creating a payment or booking.
- 02How would you diagnose and reduce database lock contention?
- 03When should a request be handled synchronously versus through a queue?
What to practise
Focus areas for this track. Practise explaining each one out loud, not just recognising it.
- API contracts, authentication, validation, and idempotency
- Data modelling, transactions, indexes, and caching
- Concurrency, queues, retries, and distributed failure modes
- Observability, capacity, deployment, and incident response
How to answer more clearly
Name the invariant you must protect before discussing storage, APIs, or scaling.
Mockery makes you answer aloud, then evaluates the transcript for technical coverage and missing concepts. It does not claim to predict a hiring decision.
Turn preparation into a spoken answer.
Start with the no-account demo, then complete one full scored interview free after signup.