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Senior Backend Engineer Interview Questions

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2,034 senior backend engineer interview questions shared by candidates

First round was 1:1 discussion where we discussed about different backend technologies such as Java, Spring, Microservices, Clean Code and Clean Architecture principle. Second round was problem solving round where I'd to write a code snippet to solve given problem.
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Sr Backend Engineer

Interviewed at Backbase

3.1★
May 6, 2022

First round was 1:1 discussion where we discussed about different backend technologies such as Java, Spring, Microservices, Clean Code and Clean Architecture principle. Second round was problem solving round where I'd to write a code snippet to solve given problem.

Talk us through your thought process on a highly complex decision you made. Please include: How did you evaluate your options? What steps did you take to de-risk the downsides of the selected solution? What outcome did that decision have? Your answer should be 500 words or less.
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Senior Backend Engineer

Interviewed at DuckDuckGo

4.4★
Sep 22, 2023

Talk us through your thought process on a highly complex decision you made. Please include: How did you evaluate your options? What steps did you take to de-risk the downsides of the selected solution? What outcome did that decision have? Your answer should be 500 words or less.

Explain the rationale for the project and whether it had the expected impact. Please include: What data (if any) indicated it was worth pursuing? How did you define success? What was the final outcome? Your answer should be 500 words or less.
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Senior Backend Engineer

Interviewed at DuckDuckGo

4.4★
Sep 22, 2023

Explain the rationale for the project and whether it had the expected impact. Please include: What data (if any) indicated it was worth pursuing? How did you define success? What was the final outcome? Your answer should be 500 words or less.

First project - describe how you were a leader in some initiative. Pays 150$. Second project - design an architecture for a service, then implement it. Pays 750$ for each part. Between the project you talk with the folks about soft skills and your submissions.
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Senior Backend Engineer

Interviewed at DuckDuckGo

4.4★
Oct 5, 2025

First project - describe how you were a leader in some initiative. Pays 150$. Second project - design an architecture for a service, then implement it. Pays 750$ for each part. Between the project you talk with the folks about soft skills and your submissions.

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