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Phonepe Backend Engineer Interview Questions

The questions to prepare for a Phonepe Backend Engineer interview. Questions from real interview reports rank first. Updated daily.

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1
CodingStart here. 16 questions · ~177 min
Resource Allocation Dynamic ProgrammingHard
Practice

Use multiple-choice knapsack DP to maximize PhonePe campaign value across merchants under a fixed budget.

Dynamic ProgrammingAlgorithmsResource AllocationPhonepe
Design Parking Lot ClassesMedium
Practice
Recently asked

Design an OOP parking lot system in Python using classes, abstraction, and efficient spot tracking.

abstractiondesign patternsoopPhonepe
Longest Subarray Sum Equals KMedium
Practice

Find the longest contiguous subarray whose sum equals K using prefix sums and a hash map.

ArraysPhonepe
Multi-Level Cache DesignMedium

Assesses your ability to design and implement a scalable caching system with correct eviction and consistency behavior.

system designperformance optimizationcachingPhonepe
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2
System Design13 questions · ~143 min
Job Scheduler With HoldsMedium

Evaluates system design skills for building a reliable job scheduler with conditional execution.

system designPhonepe
Payment Gateway High-ConcurrencyHard

Tests your system design skills for correctness, throughput, and resilience under heavy payment traffic.

system architecturePhonepe
Notification System for MillionsHard

Assesses your design for large-scale delivery, fan-out, retries, and ordering guarantees.

system architecturenotification systemscalabilityPhonepe
Distributed Payment ConsistencyHard

Evaluates your approach to consistency, idempotency, and failure handling for distributed payments.

distributed systemsPhonepe
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