Reddit Experience · Jan 2025 · Vancouver

Mastercard Summer Internship Final Interview Question!

SWE System Design Intern Hard
3 upvotes 6 replies

Interview Experience

I have my Final Interview for a Summer Internship (Vancouver) scheduled for January 22nd. The interview will be 90 minutes long, consisting of: • 60 minutes of a Technical Interview on CodeSignal with

Full Details

I have my Final Interview for a Summer Internship (Vancouver) scheduled for January 22nd. The interview will be 90 minutes long, consisting of: • 60 minutes of a Technical Interview on CodeSignal with one interviewer. • 30 minutes with an HR representative. I initially assumed the technical portion would follow a LeetCode-style format, but they mentioned it would be a bit more creative rather than strictly LC-style. You can find more details in the presentation they provided. Has anyone taken a similar interview before? Any insights on what to expect? Currently, I’m focusing on: • LeetCode Medium-Hard problems • Object-Oriented Programming (OOP) • 2-3 System Design problems Would love to hear any advice on how to best prepare!

About This Question

This is a candidate experience report from a mastercard interview for a swe role (intern level) during the system design round reported in 2025.

It covers the following topics: System Design, Oop .

Difficulty rating: Hard