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Senior Backend Developer Interview Questions

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1,028 senior backend developer interview questions shared by candidates

They asked me to design a scalable microservices architecture for an e-commerce platform. The task required defining the services, how they communicate, and ensuring that the system could handle a large number of users without crashing.
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Senior Backend Developer

Interviewed at Canvas

4.5★
Oct 8, 2024

They asked me to design a scalable microservices architecture for an e-commerce platform. The task required defining the services, how they communicate, and ensuring that the system could handle a large number of users without crashing.

Today's Interview Experience ‼️ I applied for a Senior NodeJS Backend Developer & cleared the first round of technical interview. And here's all you need to know about it: I was asked 7 questions in total - 1. How does NodeJS work? Explain the event loop in detail. 2. What would the following code snippet output? console.log("begin"); job1.then(() => {console.log("1")}); job2.then(() => {console.log("2")}); console.log("end"); 3. Remove duplicates from a sorted array in-place (in JS). 4. What's your preferred database of choice SQL or NoSQL? What would you do in the following scenario - You have a Database Table with the following scheme: (name, mobile, email, ...50 other fields) And this table is queried heavily for read operations. And it is detected that this has become a bottleneck. What would you do in this situation? 5. Discuss the advantages and disadvantages of the solutions proposed to the above question. 6. Explain how indexing is done in the database. 7. Explain how would you build a cache in the above scenario.
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Senior Backend Developer

Interviewed at Stack Finance

3.3★
Jul 11, 2024

Today's Interview Experience ‼️ I applied for a Senior NodeJS Backend Developer & cleared the first round of technical interview. And here's all you need to know about it: I was asked 7 questions in total - 1. How does NodeJS work? Explain the event loop in detail. 2. What would the following code snippet output? console.log("begin"); job1.then(() => {console.log("1")}); job2.then(() => {console.log("2")}); console.log("end"); 3. Remove duplicates from a sorted array in-place (in JS). 4. What's your preferred database of choice SQL or NoSQL? What would you do in the following scenario - You have a Database Table with the following scheme: (name, mobile, email, ...50 other fields) And this table is queried heavily for read operations. And it is detected that this has become a bottleneck. What would you do in this situation? 5. Discuss the advantages and disadvantages of the solutions proposed to the above question. 6. Explain how indexing is done in the database. 7. Explain how would you build a cache in the above scenario.

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