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Lead Backend Developer Interview Questions

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9,342 lead backend developer interview questions shared by candidates

1. Why PayPal? 2. How do you collaborate in a team? 3. What kind of role are you looking for? 4. How do you manage your calendar? 5. How do you handle multiple projects with conflicting or non-conflicting deadlines?
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Software Engineer, Backend

Interviewed at Happy Returns

3.2★
Sep 1, 2021

1. Why PayPal? 2. How do you collaborate in a team? 3. What kind of role are you looking for? 4. How do you manage your calendar? 5. How do you handle multiple projects with conflicting or non-conflicting deadlines?

1. Reverse each word in the sentence and return the sentence. 2. Different ways of finding element in an array. 3. Balance paranthesis 4. Quick sort algorithm 5. Can you use class instance as key in HashMap? does it compile? any dis-advantages? 6. Given an input which could be data stream. You have matching data which you need to match that input data stream with this matching data and return the input from data stream if there is a match. Few constraints within it.
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Senior Backend Engineer

Interviewed at PayPal

3.6★
Oct 17, 2017

1. Reverse each word in the sentence and return the sentence. 2. Different ways of finding element in an array. 3. Balance paranthesis 4. Quick sort algorithm 5. Can you use class instance as key in HashMap? does it compile? any dis-advantages? 6. Given an input which could be data stream. You have matching data which you need to match that input data stream with this matching data and return the input from data stream if there is a match. Few constraints within it.

First round: oops concept, explanation about your previous projects, ds problems like flattening a Linked List, etc and some basic database question about primary and composite key Second round: Ds problems like Max Product pair index in an integer array, check whether g first string is the rotation of the second string
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Backend Developer

Interviewed at AppDirect

3.6★
Jul 7, 2019

First round: oops concept, explanation about your previous projects, ds problems like flattening a Linked List, etc and some basic database question about primary and composite key Second round: Ds problems like Max Product pair index in an integer array, check whether g first string is the rotation of the second string

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