PayPal Interview Experience | SDE3 | Chennai
Arunbalaji M
933
Nov 25, 2025
Interview

Interview Experience

Role : Senior Software Enginer - Backend (Java)

Recruiter Screening

Was contacted by the recruiter via email for an SDE3 position and received a HackerRank test link.

HackerRank Test

Total: 3 questions

Two questions based on Priority Queue/Heap – one Easy and one Medium

One Easy-level coding question

Round 1 – DSA

Focus: More efficient solutions, deeper understanding of algorithmic trade-offs, and intermediate data structures.

Expectations: Ability to optimize code, discuss alternative approaches, and manage more complex edge cases. Expected to start thinking about

What was asked:

  • Two Medium-level coding questions

  • 5 scenario-based questions on choosing the right data structure for a use case. Note :Learn about all data structures including trie

Round 2 – System Design

Focus: More detailed system design, including handling of data flow, state management, and basic fault tolerance.

Expectations: Demonstrate the ability to design systems that can scale moderately and recover from failures. Basic understanding of trade-offs in design decisions.

What was asked:

Design of a Shopping Website, with deeper focus on

  • Cart

  • Wishlist

Follow-up questions on HLD concepts like caching, load balancing, data flow, etc.

Round 3 – Coding + Design Mixed

Focus: More complex coding tasks, including small-to-medium feature development and problem-solving that requires intermediate knowledge of the domain.

Expectations: Clean, efficient code with a good understanding of best practices and design patterns. Ability to handle more complex problems independently and introduce improvements in the codebase.

What was asked:

  • Mix of HLD, LLD, and DSA questions

  • Questions on REST vs SOAP, scaling systems, and handling huge datasets

Bar Raiser – 1

Expectations - Show initiative, demonstrate the ability to lead small projects or tasks, and begin mentoring or guiding others. Expected to handle conflicts constructively and contribute to team goals.

  • Three behavioural questions

  • Detailed discussion around PayPal principles and alignment with them

Bar Raiser – 2

  • HLD questions - Load Balancing, DB Optimization etc.,

  • Random Java & DSA questions

  • A few behavioural questions

  • Discussions on roles & responsibility in previous organization and about the projects.

  • Discussion around the role and expectations

Interview Scheduling Timeline

  • Each round lasted approximately 45 minutes

  • The gap between rounds varied from 1 to 2 weeks, depending on availability and scheduling

Note : Interview Structure may vary now. I attended in the beging of 2025

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