JPMorgan Chase Software Engineer Interview Questions

1.Describe a time when you noticed a teammate struggling with their work or falling behind. How did you help them succeed?

2.Tell me about a time you caught a potential issue before it reached production. What was the issue and how did you handle it?

3.Tell me about a time you had to choose between delivering a feature quickly for internal stakeholders versus taking extra time to improve the client experience. What did you decide and why?

4.Give me an example of when you disagreed with a product or technical decision because you felt it wasn't in the customer's best interest. How did you handle the disagreement?

5.Walk me through the last production incident you owned from detection to resolution. What went wrong, how did you respond, and what did you change afterward?

6.Tell me about a time you had to give difficult feedback to a colleague that improved their performance. What was the feedback and how did you deliver it?

7.Code me a function that validates an IBAN (International Bank Account Number) for our payment processing system. Focus on both format validation and check digit verification.

8.Design a caching strategy for our internal LLM Suite that serves 200K+ employees. The system needs to handle questions about company policies, but responses must always reflect the latest policy updates.

9.You're working on Chase Mobile's transaction processing service that handles millions of payments daily. A new requirement comes in to add real-time fraud scoring, but it would add 50ms latency to every transaction. How would you approach this trade-off?

10.You're building a new REST API for J.P. Morgan Markets that will expose trade execution data to institutional clients. What are the key design considerations you'd focus on?

11.We're migrating a legacy Oracle database that stores customer account data to AWS. The current system has 20+ years of stored procedures and triggers. Walk me through your migration strategy.

12.Our Kafka cluster that handles trade settlement messages is experiencing consumer lag during market open. The lag spikes to 30 seconds when it should stay under 1 second. How would you debug and fix this?

13.You need to build a data pipeline that ingests trade execution data from J.P. Morgan Markets and makes it available for regulatory reporting within 15 minutes. How would you design this?

14.Design a session management system for Chase Online Banking that can handle 80 million users while preventing session hijacking and meeting PCI compliance requirements.

15.You're building a real-time fraud detection system for Chase Mobile that needs to evaluate 80 million daily transactions within 100ms. How would you architect this system?

16.Design a configuration management system for our Spring Boot microservices that can safely deploy changes to 5,000+ services without causing outages. What's your approach?

17.Design a system that processes wire transfers for JPMorgan Payments, handling $10 trillion in daily volume across 100+ countries. How would you ensure zero data loss while meeting regulatory reporting deadlines?

18.You're tasked with building a rate limiting service for our public APIs that institutional clients use to access market data. The service needs to support different rate limits per client and handle 100K requests per second. How would you design this?

19.Tell me about a time you inherited code or a system from another team that was poorly documented or difficult to maintain. How did you lead the improvement effort?

20.Give me an example of when you mentored or coached a junior engineer through a challenging technical problem. What was your approach and what did they learn?

21.Tell me about a time you had to convince engineers from multiple teams to adopt a new technical standard or practice. How did you get buy-in without having formal authority?

22.Describe a situation where you had to advocate for additional testing or quality measures when your team was under pressure to ship quickly. How did you make the case?

23.Describe a time when you had to make a technical decision that balanced innovation with regulatory compliance. How did you navigate competing priorities?

24.Tell me about a time you had to coordinate a technical solution across multiple engineering teams with different priorities and timelines. How did you align everyone toward a common goal?

25.Chase Mobile processes about 80 million daily transactions. If our fraud detection system flags 2% as suspicious and requires manual review, estimate how many fraud analysts we'd need to review those cases within 4 hours.

26.Chase Mobile went down for 15 minutes during peak hours, affecting 5 million active users. Estimate the business impact and walk me through how you'd calculate it.

27.Our corporate clients report that wire transfer confirmations from JPMorgan Payments are arriving 20% slower than usual. Market open is in 2 hours. How would you diagnose this?

28.J.P. Morgan Markets wants to add a new currency pair to our FX trading platform that could generate $50M annual revenue. The engineering work is estimated at 8 engineer-months. How would you evaluate if this is worth building?

29.Our internal LLM Suite has 200K daily active users across JPMorgan Chase, but GPU costs are running $2M per month. The CFO wants to cut costs by 40% while maintaining user satisfaction. What's your approach?

30.Onyx by J.P. Morgan is expanding to process $100B in blockchain-based payments annually. Our current architecture handles $10B. What technical and business factors would you analyze to plan this 10x scale increase?