PayU Interview Experience – Senior Software Engineer (Bangalore)
- Location
- Bangalore
- Posted
- 7 Mar 2026
Summary
I attended an interview with PayU for a Senior Software Engineer role in Bangalore, which included rounds on DSA, backend fundamentals, and low-level system design for a transaction processing system. My interview journey ended at the system design round.
How it went
I recently attended an interview with PayU for a Senior Software Engineer role in Bangalore. The interview process typically consists of 4–5 rounds covering DSA, system design, and backend engineering concepts.
Round 1 – DSA & Backend Fundamentals
The first round focused on:
Data Structures and Algorithms (DSA)
Core Java concepts and basic design patterns
Questions related to Spring Boot
Microservices architecture fundamentals
Interviewers asked conceptual questions and some problem-solving discussions to evaluate understanding of backend development and Java ecosystem.
Round 2 – Low-Level Design (LLD)
In the second round, I was asked to design a transaction processing system with the following components:
A → Web Service Layer Handles incoming requests and communicates with customers.
B → Credit/Debit Banking Service Responsible for processing credit and debit transactions securely.
C → Communication/Notification Service Sends notifications (such as SMS/email) to customers after transaction processing.
My interview journey ended at the system design round, but it was a great learning experience
Questions asked (1)
- 01
Design a Transaction Processing System
System Design
I was asked to design a transaction processing system with the following components:
A → Web Service Layer Handles incoming requests and communicates with customers.
B → Credit/Debit Banking Service Responsible for processing credit and debit transactions securely.
C → Communication/Notification Service Sends notifications (such as SMS/email) to customers after transaction processing.