During your tenure, you might have encountered many challenges due to new requirements. Can you explain one or two such challenges you faced, how you overcame them, and what the solution was?

Sure. In my last role, we had to integrate a new payment gateway that required real‑time fraud detection. The challenge was that our existing system was batch‑oriented and couldn’t handle the latency. I led a small team to redesign the data flow: we introduced a message queue (Kafka) to decouple the payment request from the fraud service, added a lightweight microservice for fraud checks, and implemented a retry mechanism for failed transactions. We also wrote unit tests and performed load testing to ensure the new pipeline could handle 10,000 transactions per second. As a result, the integration was completed two weeks ahead of schedule, and the fraud detection accuracy improved by 15%. This experience taught me the importance of modular architecture and proactive performance testing.