Master System
Design
Interviews

Practice distributed systems with interview-style prompts, an interactive whiteboard, voice or chat, and focused AI feedback.

Basic Blog Platform
📝
Sticky Note
Add notes and annotations
👤
User
End users or clients
🖥️
Web Server
Application servers
⚖️
Load Balancer
Traffic distribution
📦
Cache
In-memory data store
🚪
API Gateway
API management
☁️
Compute Service
Virtual servers & compute
Serverless Function
Function as a Service
👤
User
⚖️
Load Balancer
🖥️
Server
🗄️
Database
+

PRACTICE COMMON SYSTEM DESIGN PROMPTS

Everything you need to practice the full interview

A practical workspace for prompts, diagrams, conversation, and feedback.

AI-Assisted Interviews

Get real-time feedback on your architecture choices from our intelligent interviewer that adapts to your seniority level.

Interactive Whiteboard

Draw system diagrams with our intuitive engine. Create components, data flows, and share your design visually with ease.

Real-world Problems

Practice common interview-style prompts, from URL shorteners to globally distributed social networks.

Ready for a focused
practice session?

Work through one prompt, explain your design, and review the feedback while it is still fresh.