Ace Your AI System Design Interview
Master distributed systems with interactive component-level feedback on a live architecture whiteboard.
Why We Are Different
Most AI interviewers just talk. We listen, watch, and collaborate.
Standard AI Tutors
- ✕Rigid & ScriptedFollows a fixed linear script regardless of your unique design choices.
- ✕Static CanvasJust a drawing board with no AI interaction or session playback.
- ✕Generic FeedbackSummarized opinions like "Work on scaling" without actionable metrics.
- ✕Unlimited TimeNo pressure. You can take 2 hours to finish, which never happens in real life.
EngMock.com
- Dynamic Adaptive InteractionOur AI listens and adapts. It provides Socratic hints or "deep-dive" pushbacks based strictly on your verbalized trade-offs.
- Active Whiteboard & Video ReplayAI can clarify diagrams on request. Review every move with full Video Recording & Whiteboard Playback.
- Granular Signal AnalysisData-driven scoring on Communication, Technical Depth, System Design, Problem Solving, and Trade-offs.
- Strict Interview ProtocolHard 45/60 min limit. Follows the standard FAANG flow: Requirements → API → Schema → High-Level → Deep Dive.
Everything You Need to Succeed
Practice like you're in a real interview with AI-powered feedback and interactive tools
Fluid Voice Interaction
Experience natural, zero-latency conversations. It feels just like talking to a real interviewer.
Collaborative Whiteboard
Draw architecture diagrams live. The AI understands your visuals and can draw to unblock you when needed.
Instant Detailed Feedback
Get comprehensive evaluation immediately after interview with actionable insights.
Big Tech Standards
Evaluated using FAANG interview criteria across 6 key dimensions.
Progress Tracking
Track your improvement over time with detailed analytics and score trends.
30+ Real Scenarios
Practice actual interview questions from top tech companies.
Timeline Playback
Review your interview with clickable timestamps to see exactly where you can improve.
Structured Evaluation
Follow the 6-step system design framework used by top companies.
How It Works
Get interview-ready in 4 simple steps
Choose Your Scenario
Select from 30+ real system design questions from top tech companies
Discuss with AI
Talk through requirements and constraints with our AI interviewer
Design on Whiteboard
Draw your architecture diagram with our interactive whiteboard
Get Instant Feedback
Receive detailed evaluation across 6 dimensions with actionable advice
Simple, Transparent Pricing
Start free, upgrade when you're ready to master your system design skills.
Free Trial
Try the AI bar-raiser
- 1 Trial Interview Credit (For URL Shortener Only)
- Standard Technical Feedback
- FAANG-style Rubric Preview
- Interactive Whiteboard
Starter Pack
Perfect for a quick refresh
- 5 Interview Credits
- Full AI & Socratic Feedback
- Deep-dive Performance Reports
- Whiteboard Replay & Analysis
- Valid for 90 days
Value Pack
Comprehensive prep for offers
- 15 Interview Credits
- Full AI & Socratic Feedback
- Deep-dive Performance Reports
- Whiteboard Replay & Analysis
- Valid for 90 days
Ultimate Pack
The path to L5/L6 mastery
- 40 Interview Credits
- Full AI & Socratic Feedback
- Deep-dive Performance Reports
- Whiteboard Replay & Analysis
- Valid for 180 days
What's Coming Next
We're building the future of interview prep — all powered by credits
FAANG Resume Review
AI-powered resume evaluation and targeted editing optimized for Big Tech standards. Get detailed feedback on format, content, and impact.
Resume Deep Dive Interview
AI mock interviews that probe deep into your resume projects and experience — with detailed scoring and improvement suggestions.
AI-Assisted Interview
A new interview format testing your ability to leverage AI tools to solve complex problems — the future of technical hiring.
Universal Credit System
All features — interviews, resume reviews, and more — use the same credit balance. Buy once, use anywhere.
Ready to Ace Your Interview?
Join thousands of engineers preparing for their dream job
Start Mock Interview