4 write-ups · 35 questions

Paypay Backend Engineer interview experience

Every Paypay Backend Engineer interview written up on the site: the rounds, the questions asked, how candidates prepared and whether they got the offer.

Paypay Backend Engineer interviews at a glance

Worked out from the 4 Paypay Backend Engineer write-ups on this site.

interview write-ups
4
median experience
4.3 yrs
latest write-up
Sept 2026

What the rounds test

  • System Design16 · 46%
  • Data Structures & Algorithms11 · 31%
  • Other4 · 11%
  • Behavioral4 · 11%

Question difficulty

  • Medium2 · 50%
  • Hard2 · 50%

Roles covered

Locations

Gurgaon (1) · Japan (1)

Paypay Backend Engineer interview experiences1–4 of 4

Questions asked in Paypay Backend Engineer interviews

  1. 01

    Next Greatest Element in Circular Array

    Data Structures & Algorithms · Medium

  2. 02

    Project Optimization Techniques

    Other

  3. 03

    Database Selection & Comparison

    System Design

  4. 04

    NoSQL Scalability & Distributed Systems Concepts

    System Design

  5. 05

    SQL Database Isolation Levels & Indexing

    System Design

  6. 06

    API Idempotency & HTTP Methods

    System Design

  7. 07

    Optimistic vs. Pessimistic Locking

    System Design

  8. 08

    BST Time Complexity

    Data Structures & Algorithms

  9. 09

    Max Consecutive Ones III

    Data Structures & Algorithms · Medium

  10. 10

    Maximum Path Sum in Binary Tree

    Data Structures & Algorithms · Hard

  11. 11

    Preventing Double Payments in Payment System

    System Design

  12. 12

    Handling Concurrent Actions from Multiple Devices

    System Design

All Paypay interview questions

Paypay Backend Engineer interview FAQ

What does the Paypay Backend Engineer interview focus on?

Across 4 Paypay Backend Engineer interview experiences shared on Interview Experiences, the questions asked were mostly system design (46% of reported questions), data structures & algorithms (31% of reported questions), other (11% of reported questions).

How hard is the Paypay Backend Engineer interview?

Candidates rated most Paypay Backend Engineer questions as medium (50% of rated questions). Medium: 50%, Hard: 50%.

How much experience did Paypay Backend Engineer candidates have?

The median candidate had 4.3 years of experience.

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