Learn system design in a course built only for you. And actually retain it.
The structured approach to system design interviews: requirements, capacity estimation, component trade-offs, and narrating your reasoning like a senior engineer.
Free to start · no account needed
Built around your goal, not a catalog
What your course could open with
lrnit interviews you first (what you know, why you’re learning, how you think), then generates every lesson for that. Sample lessons from a course like yours:
Measured, not watched
By the end, you’ll be able to
- Run a structured 45-minute design discussion under pressure
- Do capacity estimation quickly and credibly
- Defend architectural trade-offs instead of name-dropping components
What a capability check looks likebeforenow
Run capacity estimates+64
Defend a trade-off+61
Structure the discussion+64
Every lesson ends in assessment. Mastery is tracked per concept with spaced review, and the course adapts to what you actually retain. Finishing means a timed final exam and a verifiable certificate, not a completion badge.
“It felt like the course already knew what I did for a living.”
Questions people ask
- What experience does this assume?
- Working software engineering experience. It is aimed at engineers preparing for design rounds, not at beginners.
- Does it teach a repeatable approach or just examples?
- A repeatable approach: requirements, capacity estimation, component trade-offs, and narrating your reasoning, then applied in mock rounds like a URL shortener.
- Will it help beyond interviews?
- Yes. The trade-off vocabulary and estimation habits are the same ones used in real design discussions.
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