Plaud.AI Backend Engineer Interview Experience

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plaud.ai
· Backend Engineer
May 11, 2026 · 6 reads

Summary

I went through an initial screen followed by two rounds: a system design round and a coding + behavioral round. I received an offer.

Full Experience

I applied using LinkedIn and the recruiter reached out to me via email.

I scheduled the initial screen with her. Later there were 2 rounds. The first one was a system design (1 hour), and the second one was a mix of behavioral questions for 10–15 minutes post introductions, along with a coding question to be solved within 35 minutes.

I got the offer.

Coding question - Leetcode Hard - LeetCode #76 — Minimum Window Substring

System design - Design a system where users can donate.

Interview Questions (2)

1.

Minimum Window Substring

Data Structures & Algorithms·Hard

Given two strings s and t of lengths m and n respectively, return the minimum window substring of s such that every character in t (including duplicates) is included in the window. If there is no such substring, return the empty string "".

The test cases will be generated such that the answer is unique.

2.

Design Donation System

System Design

Design a system where users can donate. This includes handling user accounts, managing donations, processing payments, storing transaction history, and ensuring scalability and security.

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