Top 50 Backend Engineer Interview Questions
The 50 most important questions to prepare for Backend Engineer interviews. Questions from real interview reports rank first. Updated weekly.
Explain SQL vs NoSQL trade-offs, including schema design, consistency, scaling, and query flexibility.
Insight Global
University of Southern California
BungalowExplain the ACID properties of database transactions and their importance.
CATERPILLAR
Sopra Steria
NielsenExplain how to improve coding solutions by reducing time complexity first, then balancing space trade-offs.
Alten Spain
OpenText
KaratExplain how to derive time and space complexity for a coding solution and justify the final Big O bounds.
PayU
Corteva AgriscienceSign up to see every question
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Explain how you prioritize technical debt versus feature work while aligning stakeholders and protecting delivery speed.
Undisclosed
DoubleVerifyTests your understanding of consistency models, distributed transactions, and practical trade-offs.
ShopeeTTrainlineAAirtel DigitalDesign a URL shortening service that routes, ranks, and monitors links at scale.
Amazon DSP
Applied Intuition
Dover IndiaDesign a real-time pipeline for sensor events that transforms data and feeds a UI with low latency.
Boeing Intelligence & Analytics
Blend
Samsara