SDE 3 at J.P. Morgan

How it went

What they would tell you

How to prepare

Their background

Round by round

1. 1

   OA60 min

   The OA was on hacker earth and had two problems, one linked list based and one dynamic programming, I solved both.

   • Linked List
   • DP
2. 2

   CodePair Round60 min

   The first round was DSA-focused. They started by giving me a Pull Request to review. I shared my thoughts on things like avoiding hardcoded values, hashing passwords, and following proper design patterns. Then I was given a medium-level array problem involving sorting, filtering, and searching. After solving it, I rewrote the solution using Java Streams. Everything was done on a HackerRank CodePair link, which made it feel like a live coding session.

   • Array
3. 3

   High Level Design60 min

   Design a scalable loan processing system for a bank. Handle loan applications, approval workflows, disbursals, repayment schedules, and user notifications. I started with functional requirements apply for loan, status tracking, approvals, disbursals, repayments, notifications. Non-functional- Scalability, consistency, fault tolerance, low latency. High-level architecture- API gateway, application service, underwriting engine, payment service, notification service. Database schema- Users, applications, loan products, repayments, audits. Scalability- Shard by customer region, use caching for hot loan products, use async processing for notifications. Fault tolerance- Retries, dead-letter queues, reconciliation jobs for failed transactions.

4. 4

   HM60 min

   The last round was with the Hiring Manager, asked about my previous work , projects, my past experience, tech stack, and also threw in some behavioral questions.

What came up