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Mastercard· Senior Java Backend Engineer

[UPDATE 1] First interview at Mastercard L7 (Senior Java Backend Engineer)

Posted
5 Oct 2026
9 reads

Summary

I completed the first behavioral interview for a Senior Java Backend Engineer role at Mastercard, which focused on background and behavioral questions, and I am now preparing for a live coding round.

How it went

Hey everyone! I'm going to have a interview on the Mastercard in two days

It's a Senior role for Java. Anyone here made the interview for Mastercard those days ? How it was ? They made system design questions or algorithm questions ? What was your impression about the company ?

This is gonna be much helpful! I'm anxious with this interview lol

Thank you!

(After the interview, i'm gonna update here the questions and my impression about it)

UPDATE 1:

Hey guys, just finalized the interview. It was more a comportamental and backgroud interview, dosent have any system design question or tech question on this first interview.

How it was: She told me what it's the project I will be alocated in case I pass. Explained the chalenges and present some infos about Mastercard. After that, I introduce myself and my professional background, and talk about my 2 most recents experiences.

Then she started ask some questions.

1.What it was your biggest techinal challenge and how you solve it?

2.Tell me about one time you disagreed on an techinical decision and what you did

3.Have you ever have experience on mentoring inttern, junior, mid levels ?

Afther that we talk a little more about the project challenges, and I asked some questions for her about the company, culture, projects..

It was a good talk and i feelt confident on my anserws (I have simulated almost all the same questions talnkig with the GPT lol)

Now the next step is an 1 hour live coding with 2 developers of the team. (NOW I'M NERVOUS).

The live coding don't have a date yet. After the live coding interview, I came here to talk about it.

Questions asked (3)

  1. 01

    Describe your biggest technical challenge and how you solved it

    Behavioral

    What was your biggest technical challenge and how did you solve it?

  2. 02

    Disagreement on a technical decision

    Behavioral

    Tell me about one time you disagreed on a technical decision and what you did.

  3. 03

    Experience mentoring junior engineers

    Behavioral

    Have you ever had experience mentoring interns, junior, or mid‑level engineers?

How they prepared

I simulated almost all the same questions using GPT and practiced my answers.

Know someone preparing? Send it to them:WhatsAppLinkedInX

Interviewed at Mastercard recently?

Write up your rounds while you still remember the questions. It helps the next person more than you would think.

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