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Backend Software Engineer Interview Questions

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15,496 backend software engineer interview questions shared by candidates

1st round: 1. Time and Space complexity of all the data structures and algorithms. 2. What is Scaling? What is Vertical and Horizontal Scaling? 3. Questions on Java 8 2nd round: 3 coding questions, I attended only two 1. Balancing brackets like "()[]{}" and "([)]" . Push in stack if open bracker is encountered and pop from Stack if closing bracket is the and match them. https://leetcode.com/problems/valid-parentheses/ 2. Given a linked list, determine if it has a cycle in it https://leetcode.com/problems/linked-list-cycle/
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Senior Backend Engineer - Content Discovery

Interviewed at Glovo

3.4★
Oct 31, 2021

1st round: 1. Time and Space complexity of all the data structures and algorithms. 2. What is Scaling? What is Vertical and Horizontal Scaling? 3. Questions on Java 8 2nd round: 3 coding questions, I attended only two 1. Balancing brackets like "()[]{}" and "([)]" . Push in stack if open bracker is encountered and pop from Stack if closing bracket is the and match them. https://leetcode.com/problems/valid-parentheses/ 2. Given a linked list, determine if it has a cycle in it https://leetcode.com/problems/linked-list-cycle/

I think this is a short time to complete these two questions in a decent manner that shows my coding abilities. Home assignment questions: First question - given a list/array of integers, return a list of sums of the factors of each integer. The trivial solution is not good enough since there were test cases that checked execution time. Second question- connect to a given URL (with a simple query param to get as an input) get in return a huge json, from which you need a single value for an internal json object within that json.
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Backend Engineer

Interviewed at Orca Security

4.1★
Aug 18, 2022

I think this is a short time to complete these two questions in a decent manner that shows my coding abilities. Home assignment questions: First question - given a list/array of integers, return a list of sums of the factors of each integer. The trivial solution is not good enough since there were test cases that checked execution time. Second question- connect to a given URL (with a simple query param to get as an input) get in return a huge json, from which you need a single value for an internal json object within that json.

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