JPMorgan Chase Senior Software Engineer Interview Questions

1.Describe a time when a teammate was struggling with a technical challenge and you stepped in to help. What was the situation and what did you do?

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

3.Tell me about a time you had to push back on an engineering solution because it would hurt the user experience. What was the situation, and how did you make your case?

4.Give me an example of when you had to choose between what was easiest for your team and what was best for end users. What did you decide and why?

5.Walk me through the last production incident where you were the primary responder. What went wrong, how did you handle it, and what did you change afterward?

6.Tell me about a time you gave tough feedback to a peer or junior engineer that led to improved performance. How did you deliver it and what was the outcome?

7.Write a Java method that takes a list of foreign exchange transactions and returns the net position for each currency pair, handling potential precision issues with decimal arithmetic.

8.Design a caching strategy for account balance lookups that serves 80 million Chase customers. Balances must be consistent but we want to reduce database load by 70%.

9.Our payment processing system handles $10 trillion daily across multiple currencies and time zones. A service that validates cross-border transfers is failing intermittently with database connection timeouts. How would you debug this?

10.Our internal AI assistant serves 200,000 JPMorgan employees and response times have degraded from 2 seconds to 8 seconds. The LLM inference itself is fast, but something in our Spring Boot service chain is slow. How do you investigate?

11.You're building a real-time fraud detection service for Chase Mobile that needs to evaluate every transaction within 50ms. The ML model inference is taking 30ms alone. How would you architect this system?

12.You need to migrate a legacy Oracle-based trading system to our Kubernetes infrastructure on AWS. The system processes real-time market data and can't have downtime during trading hours. What's your approach?

13.Our Chase Mobile app needs to show real-time account balances to 80 million users, but we want to reduce database hits by 80%. How would you design the balance display system?

14.Design a system that tracks and reports all API calls across JPMorgan Chase's microservices for regulatory audit purposes. We need complete traceability for any request that touches customer data.

15.Our JPMorgan Payments system needs to route corporate wire transfers through different banking networks based on currency, amount, and destination country. How would you design the routing engine?

16.Design a feature toggle service that every microservice at JPMorgan Chase would call to check feature flags. It needs to handle 100 million requests per minute with sub-5ms latency.

17.Design the settlement system for J.P. Morgan Markets that processes $6 trillion in daily trades across global markets. How would you ensure all trades settle correctly even if the system goes down during market hours?

18.Design the market data distribution system for J.P. Morgan Markets that delivers real-time price feeds to thousands of trading algorithms with microsecond latency requirements.

19.Tell me about a time you had to convince multiple teams to adopt a new technology or approach when they were resistant to change. How did you build consensus?

20.Tell me about a time when you had to rebuild trust with a partner team after a significant failure or breakdown in your relationship. What was your approach?

21.Describe a time when you had to make a critical technical decision under time pressure with incomplete information. How did you approach it and what was the outcome?

22.Give me an example of when you identified that your team's engineering practices weren't meeting the standards needed for production systems. How did you drive improvement?

23.Tell me about a time you had to deliver difficult news to senior leadership about a project or system. How did you prepare and present the information?

24.Describe a situation where you had to lead a cross-functional effort involving engineering, compliance, and business teams with conflicting priorities. How did you align everyone?

25.Estimate how many JPMorgan Chase credit card transactions happen on Black Friday. Walk me through your reasoning.

26.You need to estimate how much it costs JPMorgan Chase every time our mobile app crashes for a user. What factors would you consider?

27.Our Onyx blockchain platform processes JPM Coin transfers between enterprise clients. If settlement times increased from 2 minutes to 10 minutes, how would you estimate the business impact?

28.We're seeing a 15% drop in API response times across our trading systems during London market open. No code deployments happened. How would you systematically investigate this?

29.JPMorgan Chase processes roughly $10 trillion in payments daily. If we wanted to reduce our cloud infrastructure costs by 20% without impacting service quality, how would you approach estimating which optimizations to prioritize?

30.A machine learning model that detects fraudulent transactions on Chase credit cards has started flagging 30% more transactions as suspicious this week. Fraud rates haven't actually increased. How would you investigate what's happening?