Design signup and login service
Company: Bridge.Xyz
Role: Software Engineer
Category: System Design
Difficulty: medium
Interview Round: Technical Screen
Design a basic authentication service that supports user sign-up and login using email and password. You may not rely on third-party authentication providers such as OAuth. Ignore large-scale traffic concerns, but provide a clean API design and database schema.
Your design should cover:
- Main requirements for registration and login
- API endpoints and request or response shapes
- Database tables and key fields
- How passwords are stored securely
- How login state is managed after authentication
- Basic validation and failure cases
Quick Answer: This question evaluates understanding of authentication system design, secure password storage practices, API endpoint and request/response modeling, database schema design, and session or token-based login state management.