JPMorgan Chase.

The rounds, as candidates describe them

1. Online assessmentHackerRank test with two coding problems in about 60 minutes.source ↗
2. Code pair45 minutes; a DSA problem plus a code-review task on a working Java snippet.source ↗
3. Design pair45 minutes on HackerRank's drawing tool; about 20 minutes to draw the block diagram, then discussion.source ↗
4. Behavioural / culture fitProject discussion and situation-based questions; the three rounds often run back to back on one day.source ↗

• Design a Parking Lot System that Uses an AI Number-Plate CameraSystem design
  LLD-01 · Design a Parking Lot →W02 · DAY 01 · Timeout Hell →W03 · DAY 01 · Queue vs Stream →reported in:LeetCode Discuss · JP Morgan SE3, Bangalore, Offer (2024) ↗LeetCode Discuss · JPMorganChase, June-July 2024, Select ↗LeetCode Discuss · JP Morgan Chase & Co. SDE-2, Bangalore, Offer (2024) ↗
• Scale a Monolith to 50x Traffic and Integrate a Prediction ServiceSystem design
  W10 · DAY 04 · Capacity Planning →W04 · DAY 01 · Caching Patterns →W02 · DAY 03 · Circuit Breakers →reported in:LeetCode Discuss · JP Morgan SDE-3, Bangalore (2024) ↗LeetCode Discuss · JP Morgan SWE, Mumbai, May 2023 ↗
• Break a Monolithic Shopping App into MicroservicesSystem design
  W03 · BOSS · Event-Driven Food Delivery Order System →W05 · DAY 02 · Distributed Transactions — The Saga Pattern →W03 · DAY 02 · Transactional Outbox →reported in:LeetCode Discuss · JP Morgan Chase SWE, Bengaluru (2024) ↗LeetCode Discuss · JP Morgan Chase & Co. SDE-2, Hyderabad, Offer (2024) ↗
• Design a File Sync ServiceSystem design
  IP-10 · Design a File Sync Service (Dropbox / Google Drive) →SQ-08 · AWS S3 →reported in:LeetCode Discuss · JP Morgan & Chase (JPMC) Java Developer SDE2, Bangalore (2025) ↗
• Design a Reusable Library Shared Across Many ServicesLow-level design
  W02 · DAY 03 · Circuit Breakers →W02 · DAY 01 · Timeout Hell →reported in:LeetCode Discuss · JP Morgan Associate (SDE-2), Bangalore, Offer (2025) ↗
• Find the Top K Users Logging In Each Day at Millions of LoginsSystem design
  IP-14 · Design a Real-Time Leaderboard →IP-16 · Design an Ad Click Aggregation System →W01 · DAY 04 · Hot Keys and Skew →reported in:LeetCode Discuss · JP Morgan Associate (SDE-2), Bangalore, Offer (2025) ↗
• How do you serve 500k records to a browser efficiently?Concept
  W04 · DAY 01 · Caching Patterns →W07 · DAY 05 · Location Search and Search at Scale →reported in:LeetCode Discuss · JP Morgan Chase Software Engineer II, Rejected (2023) ↗
• Which database would you choose for large volumes of unstructured data?Concept
  W00 · PART 2 · Infrastructure Building Blocks →W00 · PART 6 · System Design Terminology & Theory →reported in:LeetCode Discuss · JP Morgan Chase Software Engineer II, Rejected (2023) ↗

• Design a Payment SystemSystem design
  IP-20 · Design a Payment System →SQ-04 · Visa/Mastercard Global Payment Network →W02 · DAY 02 · Idempotency in Practice →
• Design Real-Time Card Fraud DetectionSystem design
  W08 · DAY 02 · Streaming vs Batch Processing →SQ-04 · Visa/Mastercard Global Payment Network →W02 · DAY 01 · Timeout Hell →
• Design a Tamper-Evident Transaction Audit LogSystem design
  W03 · DAY 05 · Audit Log System →W09 · DAY 05 · Security Architecture →

Study path

Every lesson the questions above point to, once, in order.

1. 01LLD-01Design a Parking Lot
2. 02W02 · DAY 01Timeout Hell
3. 03W03 · DAY 01Queue vs Stream
4. 04W10 · DAY 04Capacity Planning
5. 05W04 · DAY 01Caching Patterns
6. 06W02 · DAY 03Circuit Breakers
7. 07W03 · BOSSEvent-Driven Food Delivery Order System
8. 08W05 · DAY 02Distributed Transactions — The Saga Pattern
9. 09W03 · DAY 02Transactional Outbox
10. 10IP-10Design a File Sync Service (Dropbox / Google Drive)
11. 11SQ-08AWS S3
12. 12IP-14Design a Real-Time Leaderboard
13. 13IP-16Design an Ad Click Aggregation System
14. 14W01 · DAY 04Hot Keys and Skew
15. 15W07 · DAY 05Location Search and Search at Scale
16. 16W00 · PART 2Infrastructure Building Blocks
17. 17W00 · PART 6System Design Terminology & Theory
18. 18IP-20Design a Payment System
19. 19SQ-04Visa/Mastercard Global Payment Network
20. 20W02 · DAY 02Idempotency in Practice
21. 21W08 · DAY 02Streaming vs Batch Processing
22. 22W03 · DAY 05Audit Log System
23. 23W09 · DAY 05Security Architecture