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PayU Software Development Engineer 2 Interview Experience

Software Development Engineer 2

PayU
June 10, 2025
5 Questions
Selected

Summary

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The PayU interview process for the Software Engineer (Frontend) position was comprehensive and technically oriented. Candidates will face a series of questions encompassing advanced frontend topics such as implementing debouncing in React, creating infinite scrolling through pagination, and understanding polling mechanisms. The final round was particularly challenging, focusing on practical coding tasks and system design concepts. Overall, the experience at PayU reflects a rigorous evaluation of technical capabilities necessary for a frontend role.

1

Final round (4th)

#1

Implement Debouncing in React

Modify a provided boilerplate application to implement the debouncing technique in a real-world React project.
react
debouncing
Medium
#2

Implement 'onReachEnd' Pagination

Develop an infinite scrolling feature that triggers an event when the end of the screen is reached.
pagination
infinite-scrolling
Medium
#3

Implement a Custom Hook

Create a custom hook based on the requirements provided in the existing codebase, demonstrating reusability and proper React patterns.
react
customhook
Medium
#4

Long Polling vs. Normal Polling

Explain the differences between long polling and normal polling, providing examples of their implementations, especially with respect to a notification feature you developed.
polling
notifications
Medium
#5

Find Duplicate Elements

Given a list, find all duplicate elements within it. Provide an algorithm that is efficient in terms of time and space complexity.
dsa
duplicates
Medium
Find Duplicate Elements Problem Link

Link to the problem description for finding duplicates.

frontendinterviewsoftwareengineerpayuinterviewexperiencedsareactcustomhookpaginationpollingpayu
r

ritwik chakraborty

Verified User

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