Top 12
Prep plan
~2h total · Updated weekly · Last refresh Aug 9

Impact Recruitment Group Backend Engineer Interview Questions

The questions to prepare for a Impact Recruitment Group Backend Engineer interview. Questions from real interview reports rank first. Updated weekly.

Service-to-Service Auth DesignHard

Assesses your approach to securing distributed services and managing identity and permissions.

authenticationdistributed systemsauthorization
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LLD vs HLD With Example
Medium

Evaluates your ability to structure design work from requirements to implementation details.

design
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Caching for Read-Heavy Apps
Medium

Tests your system design thinking around caching strategy, invalidation, and performance impact.

performancecaching
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Thread-Safe Singleton PatternMedium

Explain how to implement a singleton safely under concurrency and avoid race conditions during initialization.

thread safetydesign patternspython
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Debug Memory Leak in Production
Hard

Tests your troubleshooting approach for diagnosing and mitigating memory growth in production systems.

memory leakDebuggingproduction
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Longest Subarray Sum Equals K
Medium

Evaluates your problem-solving and algorithmic skills for array and prefix-sum style challenges.

Arrays
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Process vs Thread
Easy

Assesses your understanding of concurrency primitives and how they map to real runtime behavior.

processprogramming languages
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Optimize Slow SQL on Large Data
Hard

Tests query optimization skills, performance reasoning, and practical tuning approaches.

Performance Tuningquery optimizationsql
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