14 questions · from 7 interviews
Postman interview questions
Every question candidates reported from their Postman interviews, most frequently asked first. Each links to the write-up it came from, so you can see the round and how it went.
Postman coding and DSA questions
- 01
AI Model Multi-CLI System
Build a terminal/CLI-based system that can work with multiple AI models (e.g., ChatGPT, Claude, and potentially others) and track token usage across models. The solution should abstract each model implementation, for example using the Strategy Pattern.
- 02
Find Duplicate Files in Directory
We have to write end to end code to find duplicate files present in a directory (recursively). Iterate through all files, calculate checksum and print same file names (files whose content is same - checksum will be same in this case) on same line.
- 03
Design a URL Shortener
Design/implement a URL shortener. Discussed about HTTP codes, collision etc.
Medium · From Postman SWE2 interview
- 04
Design Facebook-like Comment System
I was expected to write working API code with DB integrations locally, but the panelist and I had a good discussion around building a Facebook-like comment system with an in-memory store. We started on Google Doc.
Postman system design questions
- 01
Design Postman
Design the Postman product, covering its core architecture, key components, scalability, and data flow.
- 02
Job Executor Service System Design
High level system design of job executor service.
- 03
Design a Comment System with Annotation
Design a comment system with support for annotation. We can have one level of replies for each comment. It's possible to tag users in the comment. The interviewer focused on very low level implementation details, APIs, and algorithms for annotation.
Hard · From Postman SWE2 interview
- 04
Design Google Calendar with Async Flows
I was asked to design a system similar to Google Calendar with a focus on async flows. The panelist also focused on API design etc.
- 05
Design a Dating App
I was asked to build a dating app. I started with designing the system, defining core components like location services etc. However, the interviewer insisted on including ElasticSearch without much context or following my explanations.
- 06
Implement a URL Shortener
I was tasked with coding a URL shortener. We initially discussed the problem statement, and I presented my approach before starting to code in Node.js. I encountered a bit of a challenge during the implementation, but after receiving a hint, I was able to…
Medium · From Postman SDE (Fullstack) Interview Experience
- 07
Design and Code Facebook Comments & Reply System
Design and code a Facebook-like comments and reply system. The tech stack to be used was Node.js Express server & MongoDB. Replies should be at level 1 of nesting only, with bonus points for supporting multiple levels of reply nesting.
Medium · From Postman | SDE3 | Bangalore | May 2024 [HR Ghosted]
- 08
Design a Task Scheduler Service
Design a task scheduler service.
Hard · From Postman | SDE3 | Bangalore | May 2024 [HR Ghosted]
Postman behavioural and HR questions
- 01
New feature suggestion for Postman (Frontend)
What new feature would you add to Postman from a frontend perspective?
- 02
Favorite UX apps
What are 3 apps whose UX you really like, and why?
Postman interview questions FAQ
What questions are asked in Postman interviews?
Candidates reported 14 distinct questions across 7 Postman interviews. 4 coding and DSA questions, 8 system design questions, 2 behavioural and HR questions.
How difficult are Postman interview questions?
Of the questions candidates rated, 0% were easy, 60% medium and 40% hard.