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Software Engineer Front End Interview Questions

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13,485 software engineer front end interview questions shared by candidates

Tell me about an interesting problem. (After I answered, he revealed it should relate to scalability or cloud, which is one of the challenges at Blend). Leetcode Hard #759. The problem has nothing to do with their business, and we went into no meta dive about adapting it to their business model. You are just graded on pass/fail.
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Senior Software Engineer, Back End

Interviewed at Blend

2.5★
Feb 1, 2021

Tell me about an interesting problem. (After I answered, he revealed it should relate to scalability or cloud, which is one of the challenges at Blend). Leetcode Hard #759. The problem has nothing to do with their business, and we went into no meta dive about adapting it to their business model. You are just graded on pass/fail.

The one thing they asked me that really stood out was: "Can you describe a time when you had to refactor a large piece of legacy code? What was your approach, and how did you make sure you didn’t break anything in production?"

Front End Developer

Interviewed at United Cloud

3.9★
Dec 23, 2025

The one thing they asked me that really stood out was: "Can you describe a time when you had to refactor a large piece of legacy code? What was your approach, and how did you make sure you didn’t break anything in production?"

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