Feed System
System design interview practice (mock interview style)
Practice System Design Interviews with Structured Feedback
Design a real-world system step by step. Then get structured feedback that shows what you did well, what you missed, and what to do next.
After you click: pick a problem → design through requirements, APIs, scale, and trade-offs → get a structured review (strengths, gaps, next steps).
System design canvas in action
Practice Real System Design Problems
Real-world problems from actual interviews. Pick one and start designing—AI guides you through each stage.
Ride Matching
Messaging
Plan your interview preparation journey—step by step, with purpose.
How would you like to start?
Pick one to continue. You can switch anytime.
Guide me with a plan
Get a personalized roadmap in under a minute
Quick 4-step setupTailored milestones + Day 1 actionSave and track progress in dashboard
Start Reading (optional)
How it works
A realistic system design interview loop: design, explain trade-offs, and get interviewer-style feedback.
1
Pick a real interview problem
Choose from 50+ problems (e.g., WhatsApp, Twitter, Uber) and start immediately.
2
Design step by step with guidance
Work through requirements, APIs, scale, HLD, NFRs, and trade-offs.
3
Get a structured review
See strengths, gaps, red flags, and concrete next actions—organized like an interview rubric.
What you get
What you get after each session
A concrete output you can use to improve the next attempt—without guessing what “good” looks like.
A rubric-based summary of strengths and gaps by stage
Red flags an interviewer would notice (and how to fix them)
Specific next actions (what to add, remove, or clarify)
A clearer checklist for what to say out loud in interviews
Not sure what to practice next?
New to system design?
Today's challengeDay 67 of 38
LinkedIn System Design (Feed & Graph Architecture)
Next question in —
Someone just completed: URL Shortener
Explore learning paths
Tap a path to open the full library. Scroll down on this page to browse featured topics in each area.
System Design Guides
Interview guides—requirements, HLD, APIs, and production angles.
Architectural Thinking
Design principles, trade-offs, and system architecture.
Production Stories
Real incidents, failures, and scaling challenges.
System Fundamentals
OS, memory, networking, databases, and more.
System Design Guides
View allLong-form interview guides—requirements, HLD, APIs, and production angles—with a path into hands-on practice.
Architectural Thinking
View allDesign principles, trade-offs, and system architecture
FRAMEWORK
Design Thinking Framework
Learn how to break vague problems into solvable pieces.
PRINCIPLES
Design Principles
SOLID, DRY, KISS, YAGNI, and other principles for building maintainable software.
TRADE-OFFS
Architecture Trade-offs
Understand when to choose consistency over availability, and vice versa.
Production Stories
View allReal incidents, failures, and scaling challenges
INCIDENT
Configuration Outages
How a simple configuration change caused a 3-hour outage for millions of users.
SCALING
Connection Pool Exhaustion
What happens when your database connection pool gets exhausted at peak traffic.
ARCHITECTURE
Scaling from 1K to 10M Users
How to scale a system from 1,000 to 10 million users without rewriting everything.
System Fundamentals
View allOperating systems, memory, networking, and databases
AI-Powered Practice
Design Thinking for System Design — Practice the Right Way
1
Pick a real-world problem
Choose from problems like URL Shortener, Messaging System, or Feed Design. Our AI guides you through each one.
2
Design step by step with AI guidance
Our AI asks clarifying questions and helps you reason through requirements, scale, data, APIs, and trade-offs in real-time.
3
Get AI-powered structured feedback
Our AI analyzes your design and provides actionable feedback on: Gaps in reasoning, missing constraints, interviewer red flags, senior-level signals. No generic scores—only actionable insights.
Traditional System Design Prep vs Practice on InterviewCrafted
Most prep is read-only. Here’s how practicing on a canvas with AI feedback is different.
| Compare | Traditional learning | InterviewCrafted |
|---|---|---|
| How you practice | Read articles, watch videos — mostly passive, no hands-on design. | Interactive canvas: draw components, connect services, reason in real time. |
| Feedback | None or delayed; no interviewer-style input on your design. | AI interviewer feedback at each stage — gaps, constraints, senior-level signals. |
| Interview simulation | No structured flow; hard to rehearse the real interview loop. | Stage-by-stage flow: problem → requirements → design → tradeoffs → improve. |
| Where you build | Whiteboard or paper only; no shared, reusable artifact. | Visual architecture canvas with components (DB, cache, API, etc.). |
| Outcome | Concepts only; little repetition of the actual practice loop. | Real practice loop: design → get feedback → improve — like a real interview. |
Why InterviewCrafted?
Everything you need to master system design interviews
AI-Powered Practice
Get instant, structured feedback from AI that analyzes your design like a senior engineer.
Real-World Problems
Practice with problems from actual interviews, not theoretical scenarios.
Actionable Insights
No generic scores. Get specific feedback on gaps, constraints, and senior-level signals.
Learn from Production
Study real incidents, failures, and scaling challenges from production systems.
More ways to explore
50+
Practice Problems
AI-Powered
Instant Feedback
100+
Topics & Stories
Real-World
Production Systems
What You'll Find Inside InterviewCrafted
Content Pillars
About InterviewCrafted
InterviewCrafted is an AI-powered platform designed to help you master system design interviews. We focus on real-world practice, not rote memorization. Build scalable systems, understand trade-offs, and get instant AI feedback to refine your architectural thinking.