Mastercard Software Engineer interview: a rushed EV design and BFS coding round

My Karat round was fast, high pressure, and oddly disorganized. The interviewer had a list of questions to get through, so there was little room for a natural conversation. I got a system-design question about an EV charging scenario, and they covered multiple items in a way that made it hard to go deep on the design choices. Then I had a LeetCode-style coding problem with under 20 minutes. It wa…

Shared by a candidate · reported Jul 2026. Interview formats change; use it as a guide, not a script.