Ace Your System Design Interview
📣 Practice with an AI that interviews, challenges, and whiteboards with you.

Why BlackboardLM?
Lifelike Interviews
🎙️ Voice-based AI that listens, adapts, and challenges you like a top-tier hiring manager.
Whiteboard With Your Interviewer
✏️ Shared canvas where you and AI can draw, edit, and refine designs together.
Flip Roles & Learn
🔄 Become the interviewer. Learn from the AI who responds like a world-class candidate.
Master the Core 22
📚 Focus on the curated "Blind 22" - the most critical system design questions asked in real FAANG interviews.
Testimonials
This platform helped me pass my system design interviews with AI feedback and real simulations.
Detailed feedback and interview replays gave me clear areas to improve before interviews.
Scenario-based walkthroughs made practicing complex systems feel real and effective.
Seeing the interview from both perspectives was a game changer in my preparation.
Unlimited AI interviews and learning topics made this the best prep tool I used.
This platform helped me pass my system design interviews with AI feedback and real simulations.
Detailed feedback and interview replays gave me clear areas to improve before interviews.
Scenario-based walkthroughs made practicing complex systems feel real and effective.
Seeing the interview from both perspectives was a game changer in my preparation.
Unlimited AI interviews and learning topics made this the best prep tool I used.
This platform helped me pass my system design interviews with AI feedback and real simulations.
Detailed feedback and interview replays gave me clear areas to improve before interviews.
Scenario-based walkthroughs made practicing complex systems feel real and effective.
Seeing the interview from both perspectives was a game changer in my preparation.
Unlimited AI interviews and learning topics made this the best prep tool I used.
This platform helped me pass my system design interviews with AI feedback and real simulations.
Detailed feedback and interview replays gave me clear areas to improve before interviews.
Scenario-based walkthroughs made practicing complex systems feel real and effective.
Seeing the interview from both perspectives was a game changer in my preparation.
Unlimited AI interviews and learning topics made this the best prep tool I used.
This platform helped me pass my system design interviews with AI feedback and real simulations.
Detailed feedback and interview replays gave me clear areas to improve before interviews.
Scenario-based walkthroughs made practicing complex systems feel real and effective.
Seeing the interview from both perspectives was a game changer in my preparation.
Unlimited AI interviews and learning topics made this the best prep tool I used.
This platform helped me pass my system design interviews with AI feedback and real simulations.
Detailed feedback and interview replays gave me clear areas to improve before interviews.
Scenario-based walkthroughs made practicing complex systems feel real and effective.
Seeing the interview from both perspectives was a game changer in my preparation.
Unlimited AI interviews and learning topics made this the best prep tool I used.
This platform helped me pass my system design interviews with AI feedback and real simulations.
Detailed feedback and interview replays gave me clear areas to improve before interviews.
Scenario-based walkthroughs made practicing complex systems feel real and effective.
Seeing the interview from both perspectives was a game changer in my preparation.
Unlimited AI interviews and learning topics made this the best prep tool I used.
This platform helped me pass my system design interviews with AI feedback and real simulations.
Detailed feedback and interview replays gave me clear areas to improve before interviews.
Scenario-based walkthroughs made practicing complex systems feel real and effective.
Seeing the interview from both perspectives was a game changer in my preparation.
Unlimited AI interviews and learning topics made this the best prep tool I used.