Design A ChatGPT-Style Assistant Product

Last updated: July 3, 2026

Quick Overview

Design a product similar to ChatGPT that functions as an assistant, focusing on user interaction and functionality.

OpenAI
System Design
iOS Engineer
OpenAI
July 3, 2026
iOS Engineer
Technical Screen
System Design
Medium

19

0

141 solved


Design a product similar to ChatGPT that functions as an assistant, focusing on user interaction and functionality.

This question is typically asked during the technical screening round for iOS Engineer candidates at OpenAI. The interviewer is looking to evaluate the candidate's ability to design a scalable and user-friendly application that leverages AI technology. The focus is on understanding the candidate's thought process in creating an engaging user experience while considering technical feasibility and system architecture.

What the Interviewer Expects
  • Outline user requirements and key features of the assistant.
  • Describe a high-level architecture for the application.
  • Discuss potential challenges and trade-offs in design choices.
  • Identify scalability considerations and how to handle increased user load.
  • Explain how to ensure user data privacy and security.
Key Topics to Cover
User Experience Design
System Architecture
Scalability
Data Privacy
AI Integration
How to Approach This
  1. Start by clarifying functional and non-functional requirements with the interviewer.
  2. Estimate the scale: QPS, storage, bandwidth. This drives your design decisions.
  3. Draw a high-level architecture first, then deep dive into 1-2 critical components.
  4. Discuss trade-offs explicitly (e.g., consistency vs availability, SQL vs NoSQL).
  5. Address failure scenarios, monitoring, and how the system handles 10x traffic spikes.
Possible Follow-up Questions
  • How would you handle user feedback and iterate on the product?
  • What technologies would you use for real-time communication?
  • Can you explain how you would implement user authentication?
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Sample Answer
Requirements

To design a ChatGPT-style assistant, we first need to identify the core user requirements. Key features may include:

  1. Natural language processing for understanding user queries.
  2. Contextual awaren...
High-Level Design

The high-level architecture can be broken down into several components:

  • Frontend: An iOS app built using SwiftUI for a responsive and intuitive user interface.
  • Backend: A cloud-based serve...

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