Senior Backend Engineer Interview Questions

2,034 senior backend engineer interview questions shared by candidates

- one of users and roles, how it was authenticated, how is the db, the tables, (how the request goes through the backend), how token works, etc. - how to change the encryption in the users db, if we had MD5 to take it to SHA for example - how to call two micros to send notification, and this extended to 1M users and so, how to manage that. - how an user recovers the password, describes the flow and the link that is sent to the email.
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Senior Backend Engineer

Interviewed at Personio

3.3
Sep 30, 2022

- one of users and roles, how it was authenticated, how is the db, the tables, (how the request goes through the backend), how token works, etc. - how to change the encryption in the users db, if we had MD5 to take it to SHA for example - how to call two micros to send notification, and this extended to 1M users and so, how to manage that. - how an user recovers the password, describes the flow and the link that is sent to the email.

Comment fonctionne le sharding dans kafka ? Comment peut on s'assurer que des consommateurs ne consomment pas les messages ? Commnent fonctionne Redis ? Quel type de base de données ? Type d'usage ? Interêt ? Qu'est ce que l'observabilité ? Avez vous déjà mis en place ? Interêt ?
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Senior Backend Engineer

Interviewed at Adikteev

4.5
Jan 7, 2020

Comment fonctionne le sharding dans kafka ? Comment peut on s'assurer que des consommateurs ne consomment pas les messages ? Commnent fonctionne Redis ? Quel type de base de données ? Type d'usage ? Interêt ? Qu'est ce que l'observabilité ? Avez vous déjà mis en place ? Interêt ?

Nontechnical: 1) How do you lead your team? 2) What is your key to success? 3) How do you approach problems? Technical, where you went from one topic to another: 1) What are micro services and why would you use them? What about monolith? 2) How would you identify a bottleneck in the system? 3) How do you test and why? 4) What a RESTful services? 5) ...
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Senior Backend Engineer

Interviewed at LeanIX

4.4
Jul 29, 2022

Nontechnical: 1) How do you lead your team? 2) What is your key to success? 3) How do you approach problems? Technical, where you went from one topic to another: 1) What are micro services and why would you use them? What about monolith? 2) How would you identify a bottleneck in the system? 3) How do you test and why? 4) What a RESTful services? 5) ...

The hackerrank is probably easy/medium difficulty. 5 questions, around 3hrs total time. 1 express, 1 nodejs queue, 1 javascript promises 1 mysql (yes has to be mysql/mssql even tho its not a requirement???) 1 LC easy/medium style question with array
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Senior Backend Engineer

Interviewed at Seamless

2.8
Jan 19, 2023

The hackerrank is probably easy/medium difficulty. 5 questions, around 3hrs total time. 1 express, 1 nodejs queue, 1 javascript promises 1 mysql (yes has to be mysql/mssql even tho its not a requirement???) 1 LC easy/medium style question with array

I asked them what kind of person they’re looking for and even answered with ‘the way you described yourself is what we’re looking for’. Why having this answer? You can probably understand that this gives a message that it went well.
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Medior/Senior Product Engineer (backend)

Interviewed at Craft Docs

4.7
Dec 14, 2025

I asked them what kind of person they’re looking for and even answered with ‘the way you described yourself is what we’re looking for’. Why having this answer? You can probably understand that this gives a message that it went well.

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