DesignRounds Plus
For the last weeks before your interviews: every round, a live AI interviewer to talk your design through with, and feedback on both the design and the way you explain it.
Launching soonRequest early access and we'll email you the day Plus opens.
What's included
Every round in the library
All disciplines and levels, from a first URL shortener to staff-level distributed systems.
A live AI interviewer
Talk through your design by voice or text. It asks why, pushes on weak spots, answers questions about the brief and moves you through the stages of a real round.
Feedback on how you communicate
Alongside the design score, see how clearly, concisely and confidently you explained it, answer by answer.
Hints when you're stuck
A nudge in the right direction without giving the design away.
More reviews per round
Fix what the review found and submit again, to see the score move.
Coaching on every decision
Detailed notes on each component and connection: what works, what breaks, and what a stronger answer looks like.
Feedback on what interviewers grade
Every review scores your design on a weighted rubric. With Plus, the interviewer also judges how you explain it, answer by answer.
Your design
- Requirements and scopePin down the users, the scale and what's out of scope before drawing anything. Guide: Capacity estimation
- High-level architectureThe right components for this problem, connected the right way, and nothing it doesn't need. Guide: The interview framework
- Data model and storageA schema shaped by the access patterns, and a store chosen for them. Guide: SQL vs NoSQL
- Scale and performanceWhere the design bottlenecks under ten times the load, and how caches, shards and replicas carry it. Guide: Sharding
- Reliability and securityWhat happens when a node dies, a dependency slows down or a client misbehaves. Guide: Circuit breakers
- Trade-offs and reasoningEvery choice explained: what you gave up, and why it was worth it here. Guide: CAP theorem
How you communicate
- ClarityIs the main idea easy to follow?
- StructureDo you give the answer or an overview first, then the detail?
- ConcisionDo you say what the question needs and stop, without rambling or repeating yourself?
- CommitmentDo you choose and state your assumptions, instead of hedging or giving up?
The interviewer notes these on every answer, typed or spoken, and the final review sums them up with what to practise next.
Free and Plus, side by side
| Feature | Free | Plus |
|---|---|---|
| Practice questions | A selection in every discipline | Every question, every level |
| Architecture canvas with autosave and version history | ||
| Live AI interviewer, by voice or text | Your first round, on a free question | Every round |
| Feedback on how you communicate | In your free interviewer round | |
| Hints when you're stuck | In your free interviewer round | |
| AI review of your design, scored on the full rubric | ||
| What the review reads | Your diagram and “Why this choice?” notes | Your diagram, notes and the interview |
| Review detail | Scores, top strength and top risk | Coaching on every decision |
| Review again after fixing your design | ||
| System design handbook and roadmaps |
Be first in when Plus opens
Until then, every free feature stays free: start a round now and the review will show you where you stand.
Request early access