jobby, mock interview prep
learn system design quick
Free · Designed for iPad. Not verified for macOS.
Practice system design interviews by talking through them.
Jobby is a voice-first mock interviewer. You speak your design out loud. It listens, asks follow-ups,
challenges your tradeoffs, and scores you when you're done.
42 problems. Pick one and go.
Covers every major pattern — URL shorteners to distributed databases. Each problem has a study guide so
you can learn before you practice.
Two modes.
Practice mode walks you through it together. Interview mode doesn't help — it pushes back, probes
assumptions, and stays quiet when you're stuck. Just like the real thing.
Scored on 5 dimensions.
Structure, clarity, tradeoff reasoning, handling pushback, and conciseness. Every session ends with a
report card and specific feedback.
Pause and resume anytime.
Mid-interview and need to stop? Pick up exactly where you left off.
2 problems a day. Done in 3 weeks.
Reading doesn't stick. Talking through designs does. That's the whole idea.
Ratings & Reviews
- This app has not received enough ratings or reviews to display an overview.
Improved UI and UX.
The developer, Sharan Narasimha, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Provider
- Sharan Narasimha
- Size
- 62.5 MB
- Category
- Education
- Compatibility
Requires iOS 15.1 or later.
- iPhone
Requires iOS 15.1 or later. - iPad
Requires iPadOS 15.1 or later. - iPod touch
Requires iOS 15.1 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 Sharan Narasimhan