Lead Backend Developer Interview Questions

12,381 lead backend developer interview questions shared by candidates

Coding assignment: In a university, your attendance determines whether you will be allowed to attend your graduation ceremony. You are not allowed to miss classes for four or more consecutive days. Your graduation ceremony is on the last day of the academic year, which is the Nth day. Your task is to determine the following: 1. The number of ways to attend classes over N days. 2. The probability that you will miss your graduation ceremony. Represent the solution in the string format as "Answer of (2) / Answer of (1)", don't actually divide or reduce the fraction to decimal Test cases: for 5 days: 14/29 for 10 days: 372/773
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Backend Engineer/Senior Backend Engineer

Interviewed at Impact Analytics

3.8
Apr 13, 2023

Coding assignment: In a university, your attendance determines whether you will be allowed to attend your graduation ceremony. You are not allowed to miss classes for four or more consecutive days. Your graduation ceremony is on the last day of the academic year, which is the Nth day. Your task is to determine the following: 1. The number of ways to attend classes over N days. 2. The probability that you will miss your graduation ceremony. Represent the solution in the string format as "Answer of (2) / Answer of (1)", don't actually divide or reduce the fraction to decimal Test cases: for 5 days: 14/29 for 10 days: 372/773

Second interview - White board session, building an architecture to details. given many tokens to an API given by users, build an architecture that queries the API with all the tokens, saving the data to a data lake. All in the highest scale possible, without breaking the API restrictions or losing data along the way.
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Backend Developer

Interviewed at Lusha Systems

3.6
Dec 1, 2025

Second interview - White board session, building an architecture to details. given many tokens to an API given by users, build an architecture that queries the API with all the tokens, saving the data to a data lake. All in the highest scale possible, without breaking the API restrictions or losing data along the way.

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