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Senior Backend Engineer Interview Questions

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2,798 senior backend engineer interview questions shared by candidates

****These are not verbatim and the interview was more of a conversation than prompt and response**** Q: What was a major project you worked on and what was your role? How were you able to assess and design this feature with customer and system impact in mind? Q: When was a time when you had to decide tradeoffs with tech-debt and feature work? How did you measure success once the compromised solution was in place? Q: What makes a quality Engineer? What's an example of you demonstrating those qualities?
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Senior Backend Engineer

Interviewed at Array (NY)

2.7★
May 24, 2024

****These are not verbatim and the interview was more of a conversation than prompt and response**** Q: What was a major project you worked on and what was your role? How were you able to assess and design this feature with customer and system impact in mind? Q: When was a time when you had to decide tradeoffs with tech-debt and feature work? How did you measure success once the compromised solution was in place? Q: What makes a quality Engineer? What's an example of you demonstrating those qualities?

- calculator with a string as input such as "5 * 3 -2 *4" and returning the result - validation of a json like data structure describing a state machine with some consistency rules such as "each terminal state in the terminal key/value pair must exist in the states array, terminal states cannot have associated mappings to other states, non terminal states must have mappings to next states with transition names as key and next state as value, ..." - the system design question was about designing an anomaly or fraud detection service working with rules. The rules of the service apply to either one record or to a set of records.
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Senior Backend Developer

Interviewed at Unit21

3.4★
Mar 5, 2022

- calculator with a string as input such as "5 * 3 -2 *4" and returning the result - validation of a json like data structure describing a state machine with some consistency rules such as "each terminal state in the terminal key/value pair must exist in the states array, terminal states cannot have associated mappings to other states, non terminal states must have mappings to next states with transition names as key and next state as value, ..." - the system design question was about designing an anomaly or fraud detection service working with rules. The rules of the service apply to either one record or to a set of records.

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