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Lead Backend Developer Interview Questions

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9,384 lead backend developer interview questions shared by candidates

The AI fluency interview question was to "implement the backend for canva / google docs". The programming language fluency interview question was "implement a class for a comment section". The System Design question was "design a payment system".
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Software Engineer, Backend

Interviewed at Canva

3.9★
Oct 6, 2025

The AI fluency interview question was to "implement the backend for canva / google docs". The programming language fluency interview question was "implement a class for a comment section". The System Design question was "design a payment system".

I had a very good experience. Each stage was well defined. Before each received Email with all description what to expect and also reference of material to prepare for the interview 1- Screening call with the recruiter 2- First technical round- Interviewer showed me the code snippet and asked to review the code and discuss the improvement 2- 2nd round was System design round, I was show the requirement and based on this I had to design the system , discuss the trade off
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Senior Backend Engineer

Interviewed at Welltech

2.2★
Nov 9, 2025

I had a very good experience. Each stage was well defined. Before each received Email with all description what to expect and also reference of material to prepare for the interview 1- Screening call with the recruiter 2- First technical round- Interviewer showed me the code snippet and asked to review the code and discuss the improvement 2- 2nd round was System design round, I was show the requirement and based on this I had to design the system , discuss the trade off

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